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Quantum computing

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13.10.2021
16:51 Optics.org US group develops optical quantum network in ‘real-world’ setting

ORNL, Stanford, Purdue demonstrate a QLAN with entangled photons over “Alice-Bob-Charlie” optical fiber network.

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16:24 Phys.org Study demonstrates the potential of a quantum computer comprised of a small processor and a storage unit

Quantum computing systems, computer systems that are based on the key principles of quantum theory, could significantly outperform conventional computing systems, both in terms of speed and performance. Over the past decade or so, many physicists worldwide have thus been trying to develop these systems and assess their potential.

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12.10.2021
20:32 NewScientist.Com Spies may be storing data to decrypt with a future quantum computer

Quantum computers may one day break encryption, and security researchers say intelligence agencies may already be storing encrypted data with a plan to crack it in future

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11.10.2021
17:01 Phys.org Quantum circuit black hole lasers to explore Hawking radiation

The fundamental forces of physics govern the matter comprising the universe, yet exactly how these forces work together is still not fully understood. The existence of Hawking radiation—the particle emission from near black holes—indicates that general relativity and quantum mechanics must cooperate. But directly observing Hawking radiation from a black hole is nearly impossible due to the background noise of the universe, so how can researchers study it to better understand how the forces interact and integrate into a "Theory of Everything?"

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13:44 NewScientist.Com A new dawn in AI and quantum computing now looks tantalisingly close

Hopes of developing artificial general intelligence and a truly useful quantum computer are looking less fanciful thanks to recent breakthroughs

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08.10.2021
16:29 Optics and Photonics News A Step Toward Fault-Tolerant Quantum Computing

Using a laser-controlled ion-trap platform, researchers demonstrate code that can detect and suppress errors—and keep them from spreading and multiplying through the system.

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07.10.2021
20:15 ScienceDaily.com Quantum networking milestone in real-world environment

A team has developed and demonstrated a novel, fully functional quantum local area network, or QLAN, to enable real-time adjustments to information shared with geographically isolated systems using entangled photons passing through optical fiber.

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08:35 Technology.org Researchers reach quantum networking milestone in real-world environment

A team from the U.S. Department of Energy’s Oak Ridge National Laboratory, Stanford University and Purdue University developed

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00:14 Phys.org Researchers reach quantum networking milestone in real-world environment

A team from the U.S. Department of Energy's Oak Ridge National Laboratory, Stanford University and Purdue University developed and demonstrated a novel, fully functional quantum local area network, or QLAN, to enable real-time adjustments to information shared with geographically isolated systems at ORNL using entangled photons passing through optical fiber.

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05.10.2021
12:57 Nanowerk.com How flawed diamonds lead to flawless quantum networks

Vacancies in diamonds have long been of interest to electronics researchers because they can be used as 'quantum nodes' or points that make up a quantum network for the transfer of data.

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04:19 ScienceDaily.com Foundational step shows quantum computers can be better than the sum of their parts

Researchers have experimentally demonstrated, for the first time, that an assembly of quantum computing pieces -- a logical qubit -- can be better than the worst parts used to make it. The team shared how they took this landmark step toward reliable, practical quantum computers by implementing the Bacon-Shor code and a fault-tolerant design on an ion trap-based quantum computer.

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04.10.2021
19:35 NewScientist.Com Quantum computers can now fix their own mistakes without making more

The first demonstration of error correction on a quantum computer that doesn't lead to more mistakes is a step towards genuinely useful computation

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18:08 Phys.org Foundational step shows quantum computers can be better than the sum of their parts

Pobody's nerfect—not even the indifferent, calculating bits that are the foundation of computers. But JQI Fellow Christopher Monroe's group, together with colleagues from Duke University, have made progress toward ensuring we can trust the results of quantum computers even when they are built from pieces that sometimes fail. They have shown in an experiment, for the first time, that an assembly of quantum computing pieces can be better than the worst parts used to make it. In a paper published in the journal Nature on Oct. 4, 2021, the team shared how they took this landmark step toward reliable, practical quantum computers.

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18:04 Nature.Com Fault-tolerant control of an error-corrected qubit

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17:08 SingularityHub.Com How Quantum Computers Can Be Used to Build Better Quantum Computers

Using computer simulations to design new chips played a crucial role in the rapid improvements in processor performance we’ve experienced in recent decades. Now Chinese researchers have extended the approach to the quantum world. Electronic design automation tools started to become commonplace in the early 1980s as the complexity of processors rose exponentially, and today […]

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01.10.2021
18:06 Phys.org How flawed diamonds 'lead' to flawless quantum networks

The color in a diamond comes from a defect, or "vacancy," where there is a missing carbon atom in the crystal lattice. Vacancies have long been of interest to electronics researchers because they can be used as 'quantum nodes' or points that make up a quantum network for the transfer of data. One of the ways of introducing a defect into a diamond is by implanting it with other elements, like nitrogen, silicon, or tin. In a recent study published in ACS Photonics, scientists from Japan demonstrate that lead-vacancy centers in diamond have the right properties to function as quantum nodes. "The use of a heavy group IV atom like lead is a simple strategy to realize superior spin properties at increased temperatures, but previous studies have not been consistent in determining the optical properties of lead-vacancy centers accurately," says Associate Professor Takayuki Iwasaki of Tokyo Institute of Technology (Tokyo Tech), who led the study.

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30.09.2021
22:08 ScienceDaily.com Connecting the dots between material properties and qubit performance

Scientists studying superconducting qubits identified structural and chemical defects that may be causing quantum information loss -- an obstacle to practical quantum computation.

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10:31 Technology.org Photonic chip is key to nurturing quantum computers

Quantum computers are gaining pace. They promise to provide exponentially more computing power for certain very tricky problems.

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29.09.2021
19:57 QuantaMagazine.org Major Quantum Computing Strategy Suffers Serious Setbacks

So-called topological quantum computing would avoid many of the problems that stand in the way of full-scale quantum computers. But high-profile missteps have led some experts to question whether the field is fooling itself. The post Major Quantum Computing Strategy Suffers Serious Setbacks first appeared on Quanta Magazine

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17:47 ScienceDaily.com Photonic chip is key to 'nurturing' quantum computers

Quantum computers are gaining pace. They promise to provide exponentially more computing power for certain very tricky problems. They do this by exploiting the peculiar behaviour of quantum particles, such as photons of light. A team has now shown how to protect qubits from errors using photons in a silicon chip.

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28.09.2021
18:56 Physics.Aps.org Synopsis: Far Fewer Qubits Required for “Quantum Memory” Quantum Computers

Author(s): Erika K. CarlsonIncorporating storage units for quantum information into quantum computers may allow researchers to build such devices with several orders of magnitude fewer qubits in their processors. [Physics 14, s117] Published Tue Sep 28, 2021

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18:10 ScienceDaily.com Will twisted superconducting flakes make better components for quantum computers?

Researchers have found a way to make 'single-crystal flake' devices that are so thin and free of defects, they have the potential to outperform components used today in quantum computer circuits.

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17:18 Phys.org Will twisted superconducting flakes make better components for quantum computers?

Researchers at the University of Bath in the UK have found a way to make 'single-crystal flake' devices that are so thin and free of defects, they have the potential to outperform components used today in quantum computer circuits.

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09:11 Technology.org Will twisted superconducting flakes make better components for quantum computers?

Researchers at the University of Bath have found a way to make ‘single-crystal flake’ devices that are so

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27.09.2021
16:31 Phys.org Study demonstrates the robust storage of qubits in ultracold polar molecules

Molecules have a very intricate and rich structure, which allows them to rotate and vibrate freely. As a result, they have an almost limitless space in which computer scientists could encode quantum information. In addition to their vast internal space, molecules are capable of long-range interactions and could thus be entangled to other separate molecules.

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22.09.2021
21:46 ScienceDaily.com Quantum cryptography Records with Higher-Dimensional Photons

A new and much faster quantum cryptography protocol has been developed: Usually, quantum cryptography is done with photons that can be in two different states. Using eight different states, cryptographic keys can be generated much faster and with much more robustness against interference.

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19:43 Phys.org A new way to control qubits

A research team that includes two UO physicists have outlined new techniques for controlling the building blocks of quantum computing, a potentially significant step toward making such computers more accurate and useful.

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21.09.2021
21:23 NewScientist.Com Quantum supremacy has been achieved by a more complex quantum computer

A quantum computer made by researchers in China has outperformed classical computers, achieving what is known as quantum supremacy with a more complex quantum processor than ever before

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17:03 Optics.org UK breaks ground on £93M quantum computing center

Quantum optics expert Professor Sir Peter Knight leads a formal ceremony marking the start of construction.

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20.09.2021
22:02 Physics.Aps.org Focus: Turning a Quantum Computer into a Time Crystal

Author(s): Philip BallGoogle’s Sycamore quantum processor can simulate an elusive quantum system called a discrete time crystal. [Physics 14, 131] Published Mon Sep 20, 2021

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18:33 ScienceDaily.com All-nitride superconducting qubit made on a silicon substrate

Researchers have succeeded in developing an all-nitride superconducting qubit using epitaxial growth on a silicon substrate that does not use aluminum as the conductive material. This qubit uses niobium nitride (NbN) with a superconducting transition temperature of 16 K (-257 °C) as the electrode material, and aluminum nitride (AlN) for the insulating layer of the Josephson junction. It is a new type of qubit made of all-nitride materials grown epitaxially on a silicon substrate and free of any amorphous oxides, which are a major noise source. By realizing this new material qubit on a silicon substrate, long coherence times have been obtained: an energy relaxation time (T1) of 16 microseconds and a phase relaxation time (T2) of 22 microseconds as the mean values. This is about 32 times T1 and about 44 times T2 of nitride superconducting qubits grown on a conventional magnesium oxide substrate.

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17:25 Phys.org All-nitride superconducting qubit made on a silicon substrate

Researchers at the National Institute of Information and Communications Technology (NICT, President: Tokuda Hideyuki, Ph.D.), in collaboration with researchers at the National Institute of Advanced Industrial Science and Technology (AIST, President: Dr. Ishimura Kazuhiko) and the Tokai National Higher Education and Research System Nagoya University (President: Dr. Matsuo Seiichi) have succeeded in developing an all-nitride superconducting qubit using epitaxial growth on a silicon substrate that does not use aluminum as the conductive material.

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11:26 NewScientist.Com Quantum computer helps to design a better quantum computer

Quantum computers can simulate quantum circuits, which helps to speed up the design of new quantum processors

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17.09.2021
11:40 Technology.org Can Graphene Valleytrionics pave the Way to Household Quantum Computers?

Scientists find a way to use pristine graphene to encode and process quantum information, reshape the future of

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15.09.2021
22:20 ScienceDaily.com Light does the twist for quantum computing

Scientists have generated circularly polarized light and controlled its direction without using clunky magnets or very low temperatures. The findings show promise for the development of materials and device methods that can be used in optical quantum information processing.

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14.09.2021
17:37 LiveScience.com Otherworldly 'time crystal' made inside Google quantum computer could change physics forever

The crystals neatly sidestep some of physics' most iron-clad laws.

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10.09.2021
16:32 Phys.org A three-qubit entangled state has been realized in a fully controllable array of spin qubits in silicon

An all-RIKEN team has increased the number of silicon-based spin qubits that can be entangled from two to three, highlighting the potential of spin qubits for realizing multi-qubit quantum algorithms.

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03:16 ScienceDaily.com Breakthrough achievement in quantum computing

Researchers have set a world record for innovation in quantum computing.

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08.09.2021
18:58 Nature.Com High-fidelity laser-free universal control of trapped ion qubits

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15:52 Phys.org Graphene valleytronics: Paving the way to small-sized room-temperature quantum computers

Valleytronics is an emerging field in which valleys—local minima in the energy band structure of solids—are used to encode, process, and store quantum information. Though graphene was thought to be unsuitable for valleytronics due to its symmetrical structure, researchers from the Indian Institute of Technology Bombay, India, have recently shown that this is not the case. Their findings may pave the way to small-sized quantum computers that can operate at room temperature.

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10:17 Nanowerk.com Graphene valleytronics: Paving the way to small-sized room-temperature quantum computers

Scientists find a way to use pristine graphene in valleytronics, a promising technology for encoding and processing quantum information.

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04.09.2021
19:16 ScienceDaily.com Researchers find a way to check that quantum computers return accurate answers

Quantum computers become ever more powerful, but how can we be sure that the answers they return are accurate? A team of physicists solves this problem by letting quantum computers check each other's work.

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01:12 Phys.org Researchers use gold film to enhance quantum sensing with qubits in a 2D material

Quantum sensing is being used to outpace modern sensing processes by applying quantum mechanics to design and engineering. These optimized processes will help beat the current limits in processes like studying magnetic materials or studying biological samples. In short, quantum is the next frontier in sensing technology.

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02.09.2021
18:48 Phys.org Researchers find a way to check that quantum computers return accurate answers

Quantum computers are advancing at a rapid pace and are already starting to push the limits of the world's largest supercomputers. Yet, these devices are extremely sensitive to external influences and thus prone to errors which can change the result of the computation. This is particularly challenging for quantum computations that are beyond the reach of our trusted classical computers, where we can no longer independently verify the results through simulation. "In order to take full advantage of future quantum computers for critical calculations we need a way to ensure the output is correct, even if we cannot perform the calculation in question by other means," says Chiara Greganti from the University of Vienna.

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17:00 Phys.org Materials for superconducting qubits

The connection between microscopic material properties and qubit coherence are not well understood despite practical evidence that material imperfections present an obstacle to applications of superconducting qubits. In a new report now published on Communications Materials, Anjali Premkumar and a team of scientists in electrical engineering, nanomaterials, physics and angstrom engineering at Princeton University and in Ontario, Canada, combined measurements of transmon qubit relaxation (T1) times with spectroscopy, alongside microscopy of polycrystalline niobium (Nb) films used during qubit development. Based on films deposited via three different techniques, the team revealed correlations between transmon qubit relaxation times and intrinsic film properties, including grain size to enhance oxygen diffusion along grain boundaries, while also increasing the concentration of suboxides near the surface. The residual resistance ratio of the polycrystalline niobium films can be used as a

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09:10 Technology.org Berkeley Lab, UC Berkeley, Caltech to Build Quantum Network Testbed

Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California, Berkeley (UC Berkeley) will be home to

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01.09.2021
18:03 ScienceDaily.com Quantum networks in our future

Investigators outline how a time-sensitive network control plane could be a key component of a workable quantum network. In addition to the well-understood requirements of transmission distance and data rate, for quantum networks to be useful in a real-world setting there are at least two other requirements that need to be considered. One is real-time network control, specifically time-sensitive networking. The second is cost.

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17:11 Phys.org Fast tool developed for quantum computing and communication

Isaac Nape, an emerging South African talent in the study of quantum optics, is part of a crack team of Wits physicists who led an international study that revealed the hidden structures of quantum entangled states. The study was published in the renowned scientific journal, Nature Communications, on Friday, 27 August 2021.

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31.08.2021
20:25 Technology.org Russian physicists mix classical light with half a photon on a qubit

A Russian-U.K. research team has proposed a theoretical description for the new effect of quantum wave mixing involving

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18:02 Phys.org To develop quantum networks, the unique needs of industry must be considered and may provide a solution

Large-scale quantum networks have been proposed, but so far, they do not exist. Some components of what would make up such networks are being studied, but the control mechanism for such a large-scale network has not been developed. In AVS Quantum Science, investigators outline how a time-sensitive network control plane could be a key component of a workable quantum network.

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16:22 Phys.org Physicists mix classical light with half a photon on a qubit

A Russian-U.K. research team has proposed a theoretical description for the new effect of quantum wave mixing involving classical and nonclassical states of microwave radiation. This effect, which previously lacked a rigorous mathematical description, could be of use to quantum computer scientists and fundamental physicists probing light-matter interactions. The study is published in Physical Review A.

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30.08.2021
14:06 Photonics.com Multiplexing Quantum Modes Enable Scalable Quantum Computing Platform

Researchers at the University of Virginia developed a scalable quantum computing platform, which drastically reduces the number of devices needed to achieve quantum speed, on a photonic chip the size of a penny. Xu Yi, assistant professor of electrical and computer engineering at the University of Virginia (UVA) School of Engineering and Applied Science, focused on generating quantum modes, which span the full spectrum of variables between one and zero. Yi turned to fields of light, which are also a full spectrum; each lightwave in the spectrum has the potential to become a quantum unit. Yi hypothesized that by entangling fields of light, the light would achieve a quantum state. To realize this, Yi used multiplexing, a technique...

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25.08.2021
01:49 ScienceDaily.com Quantum computing: Exotic particle had an 'out-of-body experience'

Scientists have taken a clear picture of electronic particles that make up a mysterious magnetic state called quantum spin liquid (QSL). The achievement could facilitate the development of superfast quantum computers and energy-efficient superconductors. The scientists are the first to capture an image of how electrons in a QSL decompose into spin-like particles called spinons and charge-like particles called chargons.

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22.08.2021
17:19 ScienceDaily.com Opening a path toward quantum computing in real-world conditions

The quantum computing market is projected to reach $65 billion by 2030, a hot topic for investors and scientists alike because of its potential to solve incomprehensibly complex problems. Drug discovery is one example. To understand drug interactions, a pharmaceutical company might want to simulate the interaction of two molecules. The challenge is that each molecule is composed of a few hundred atoms, and scientists must model all the ways in which these atoms might array themselves when their respective molecules are introduced. The number of possible configurations more than the number of atoms in the entire universe. Only a quantum computer can represent, much less solve, such an expansive, dynamic data problem.

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20.08.2021
23:57 Phys.org Researchers open a path toward quantum computing in real-world conditions

The quantum computing market is projected to reach $65 billion by 2030, a hot topic for investors and scientists alike because of its potential to solve incomprehensibly complex problems.

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18:22 ScienceDaily.com Partition function zeros are ‘shortcut’ to thermodynamic calculations on quantum computers

A study has developed a new method that enables quantum computers to measure the thermodynamic properties of systems by calculating the zeros of the partition function.

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19.08.2021
20:31 Phys.org Partition function zeros are a 'shortcut' to thermodynamic calculations on quantum computers

A study led by researchers at North Carolina State University developed a new method that enables quantum computers to measure the thermodynamic properties of systems by calculating the zeros of the partition function.

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18:00 SingularityHub.Com How a Simple Crystal Could Help Pave the Way to Full-Scale Quantum Computing

Vaccine and drug development, artificial intelligence, transport and logistics, climate science—these are all areas that stand to be transformed by the development of a full-scale quantum computer. And there has been explosive growth in quantum computing investment over the past decade. Yet current quantum processors are relatively small in scale, with fewer than 100 qubits— […]

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18.08.2021
14:55 Optics.org Xanadu and imec partner to develop photonic chips for quantum computing

To fabricate ultra-low loss silicon nitride circuits for generating “error-corrected qubits”.

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14:10 Photonics.com Quantum Computer Platform Uses Optical Fiber to Perform at Room Temperature

A team at the Technical University of Denmark (DTU) has developed what it calls a “complete platform” for an optical quantum computer. The platform is universal and scalable, the team said, and takes place at room temperature. The technology is compatible with standard fiber optic networks. The demonstration of a so-called universal gate set — and the implementation of several operations by means thereof — is what the team said constitutes an optical quantum computing advancement. Gates serve to perform operations on one or more qubits, and to implement an algorithm given that qubits are carriers of information. “Our demonstration of a universal set of gates is absolutely crucial. It means that any...

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17.08.2021
09:48 Technology.org Scalable quantum computing research supported by $2 million grant

AUC Riverside materials scientist has received a $2 million grant from the National Science Foundation to improve the

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16.08.2021
04:18 ScienceDaily.com 'Missing jigsaw piece': Engineers make critical advance in quantum computer design

A decades-old problem about how to reliably control millions of qubits in a silicon quantum computer chip has now been solved.

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13.08.2021
22:48 NewScientist.Com Using microwave beams could let quantum computers be small but mighty

A decades-old theory to simplify silicon quantum processors has been shown to work, potentially paving the way for vastly more powerful quantum devices

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21:09 Phys.org Engineers make critical advance in quantum computer design

Quantum engineers from UNSW Sydney have removed a major obstacle that has stood in the way of quantum computers becoming a reality. They discovered a new technique they say will be capable of controlling millions of spin qubits—the basic units of information in a silicon quantum processor.

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18:45 ScienceDaily.com Progress in algorithms makes small, noisy quantum computers viable

Instead of waiting for fully mature quantum computers to emerge, researchers have developed hybrid classical/quantum algorithms to extract the most performance -- and potentially quantum advantage -- from today's noisy, error-prone hardware.

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17:30 Phys.org A complete platform for quantum computing

In a new groundbreaking work, researchers from DTU have now realized the complete platform for an optical quantum computer. The platform is universal and scalable, it all takes place at room temperature, and the technology is directly compatible with standard fiber optic networks. This puts DTU right at the forefront of the development.

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17:19 Phys.org Progress in algorithms makes small, noisy quantum computers viable

As reported in a new article in Nature Reviews Physics, instead of waiting for fully mature quantum computers to emerge, Los Alamos National Laboratory and other leading institutions have developed hybrid classical/quantum algorithms to extract the most performance—and potentially quantum advantage—from today's noisy, error-prone hardware. Known as variational quantum algorithms, they use the quantum boxes to manipulate quantum systems while shifting much of the work load to classical computers to let them do what they currently do best: solve optimization problems.

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09.08.2021
18:12 Phys.org Qubit in a crystal lattice of boron nitride is a suitable sensor

An artificially created spin defect (qubit) in a crystal lattice of boron nitride is suitable as a sensor enabling the measurement of different changes in its local environment. The qubit is a boron vacancy located in a two-dimensional layer of hexagonal boron nitride and has an angular momentum (spin).

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11:12 Nanowerk.com Qubits under pressure

A new type of atomic sensor made of boron nitride is based on a qubit in the crystal lattice and is superior to comparable sensors.

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06.08.2021
15:56 Nanowerk.com Quantum computing enables unprecedented materials science simulations

Researchers have for the first time used a quantum computer to generate accurate results from materials science simulations that can be verified with practical techniques.

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04.08.2021
18:55 Physics.Aps.org Synopsis: Magnetic Skyrmions Could Act as Qubits

Author(s): Marric StephensPredictions suggest that magnetic quasiparticles known as skyrmions could provide the basis for a novel quantum-computing platform. [Physics 14, s99] Published Wed Aug 04, 2021

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00:16 NewScientist.Com Google researchers made a time crystal inside a quantum computer

A time crystal is a unique phase of matter that flips between two states with no energy input necessary – first proposed in 2012, this type of matter has now been created inside a quantum computer built by Google

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03.08.2021
19:01 Physics.Aps.org Synopsis: Carbon Nanotubes Flex as Qubits

Author(s): Rachel BerkowitzA suspended carbon nanotube coupled to a double quantum dot makes a mechanical oscillator that serves as a qubit. [Physics 14, s96] Published Tue Aug 03, 2021

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30.07.2021
17:50 Phys.org An effective strategy for protecting skyrmions in quantum computing devices

A magnetic skyrmion is a versatile topological object that can be used to carry information in future spintronic information processing devices. As potential non-volatile information carriers, excellent endurance and robust retention are desired properties of skyrmions in spintronic devices. However, previous studies have suggested that skyrmions can be easily destroyed at device edges during high-speed operations due to the so-called skyrmion Hall effect.

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27.07.2021
21:23 Photonics.com PsiQuantum Will Build Commercial Quantum Computer Development

PsiQuantum has raised $450 million in Series D funding to build the world’s first commercially viable quantum computer, the company said. The company intends to build a fault-tolerant quantum computer supported by a scalable and proven manufacturing process. The company’s technology manipulates single photons using circuits that are patterned onto a silicon chip using standard semiconductor manufacturing processes. The company is manufacturing quantum photonic chips, as well as cryogenic electronic chips to control the qubits, using the advanced semiconductor tools in the production line of PsiQuantum’s manufacturing partner GlobalFoundries. The funding round was led by funds and accounts managed by BlackRock, along...

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26.07.2021
19:00 Physics.Aps.org Viewpoint: Tin Qubits Give Diamond a New Shine

Author(s): Evangelia Takou and Sophia E. EconomouNanophotonic devices based on tin-vacancy qubits in diamond show promise as building blocks of quantum repeaters, an important step toward the realization of long-range quantum networks. [Physics 14, 105] Published Mon Jul 26, 2021

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17:19 Phys.org Combining two approaches to advance quantum computing

Quantum computers hold the potential to out-perform all conventional computing systems. Two promising physical implementations for the storage and manipulation of quantum information are the electromagnetic modes of superconducting circuits and the spins of small numbers of electrons trapped in semiconductor quantum dots.

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19.07.2021
18:29 SingularityHub.Com Google Gets One Step Closer to Error-Corrected Quantum Computing

One of the biggest barriers standing in the way of useful quantum computers is how error-prone today’s devices are. Now, Google has provided an experimental demonstration of how to correct this problem and scale it up for much larger devices. The power of quantum computers comes from their ability to manipulate exotic quantum states, but […]

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16.07.2021
17:09 ScienceDaily.com Unconventional superconductor acts the part of a promising quantum computing platform

Scientists on the hunt for an unconventional kind of superconductor have produced the most compelling evidence to date that they've found one. Researchers have shown that uranium ditelluride displays many of the hallmarks of a topological superconductor -- a material that may unlock new ways to build quantum computers and other futuristic devices.

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10:37 Phys.org Unconventional superconductor acts the part of a promising quantum computing platform

Scientists on the hunt for an unconventional kind of superconductor have produced the most compelling evidence to date that they've found one. In a pair of papers, researchers at the University of Maryland's (UMD) Quantum Materials Center (QMC) and colleagues have shown that uranium ditelluride (or UTe2 for short) displays many of the hallmarks of a topological superconductor—a material that may unlock new ways to build quantum computers and other futuristic devices.

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15.07.2021
17:16 Phys.org Adding logical qubits to Sycamore quantum computer reduces error rate

The Google Quantum AI team has found that adding logical qubits to the company's quantum computer reduced the logical qubit error rate exponentially. In their paper published in the journal Nature, the group describes their work with logical qubits as an error correction technique and outline what they have learned so far.

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01:53 ScienceMag.org Physicists move closer to defeating errors in quantum computation

Conceptually, new advance takes Google researchers halfway to pivotal goal

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14.07.2021
19:40 NewScientist.Com Google demonstrates vital step towards large-scale quantum computers

Google has shown that its Sycamore quantum computer can detect and fix computational errors, an essential step for large-scale quantum computing, but its current system generates more errors than it solves

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13:13 Optics and Photonics News Taking Quantum Cryptography Out of the Spotlight

Power limiter could shield quantum-encrypted communications from eavesdropping attacks that depend on bright light.

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12.07.2021
20:12 Phys.org Chinese achieve new milestone with 56 qubit computer

A team of researchers affiliated with multiple institutions in China, working at the University of Science and Technology of China, has achieved another milestone in the development of a usable quantum computer. The group has written a paper describing its latest efforts and have uploaded it to the arXiv preprint server.

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11.07.2021
11:13 Technology.org DTU researchers tighten grip on quantum computer

In new groundbreaking work, researchers from DTU have now realized the complete platform for an optical quantum computer.

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09.07.2021
21:41 ScienceDaily.com Physicists take big step in race to quantum computing

A team of physicists has developed a special type of quantum computer known as a programmable quantum simulator capable of operating with 256 quantum bits, or 'qubits.'

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08.07.2021
16:52 Phys.org Team develops quantum simulator with 256 qubits, largest of its kind ever created

A team of physicists from the Harvard-MIT Center for Ultracold Atoms and other universities has developed a special type of quantum computer known as a programmable quantum simulator capable of operating with 256 quantum bits, or "qubits."

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07.07.2021
17:06 ScientificAmerican.Com How Does a Quantum Computer Work?

If you understand how these systems operate, then you understand why they could change everything. -- Read more on ScientificAmerican.com

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06.07.2021
15:22 Nature.Com Daily briefing: Biology begins to tangle with quantum computing

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05.07.2021
22:12 Phys.org Software evaluates qubits, characterizes noise in quantum annealers

High-performance computer users in the market for a quantum annealing machine or looking for ways to get the most out of one they already have will benefit from a new, open-source software tool for evaluating these emerging platforms at the individual qubit level.

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18:32 NewScientist.Com China beats Google to claim the world's most powerful quantum computer

A team in China has demonstrated that it has the world's most powerful quantum computer, leapfrogging the previous record holder, Google

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30.06.2021
12:09 Technology.org A new piece of the quantum computing puzzle

Research from the McKelvey School of Engineering at Washington University in St. Louis has found a missing piece

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02:07 ScienceDaily.com A new piece of the quantum computing puzzle

Scientists have developed a groundbreaking quantum logic gate that brings quantum computing closer to reality.

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29.06.2021
16:46 Phys.org A new piece of the quantum computing puzzle

Research from the McKelvey School of Engineering at Washington University in St. Louis has found a missing piece in the puzzle of optical quantum computing.

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25.06.2021
14:10 Photonics.com Storing Method Grants Room-Temperature Qubits Longer Life

Researchers at the University of Copenhagen have demonstrated a method for storing qubits at room temperature for a duration that is hundreds of times longer than has been achieved with previous approaches. The method takes a new approach to the quantum measurements taken within a quantum chip, which is coated with paraffin to remove the need for large, often more expensive cooling systems. The research team, led by Eugene Polzik, previously worked with paraffin for room-temperature experiments such as quantum measurements and teleportation — as have other groups. In earlier approaches to quantum memory, quantum states were encoded in the amplitude and phase of light transmitted/emitted by the atoms. The amplitude and...

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22.06.2021
15:18 Phys.org Classic magic trick may enable quantum computing

Quantum computing could solve problems that are difficult for traditional computer systems. It may seem like magic. One step toward achieving quantum computing even resembles a magician's trick: levitation. A new project at the U.S. Department of Energy's Thomas Jefferson National Accelerator Facility will attempt this trick by levitating a microscopic particle in a superconducting radiofrequency (SRF) cavity to observe quantum phenomena.

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04:00 ScienceDaily.com Quantum computing: Common perovskite superfluoresces at high temperatures

A commonly studied perovskite can superfluoresce at temperatures that are practical to achieve and at timescales long enough to make it potentially useful in quantum computing applications.

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02:55 ScienceDaily.com Compact quantum computer for server centers

Quantum computers have been one-of-a-kind devices that fill entire laboratories. Now, physicists have built a prototype of an ion trap quantum computer that can be used in industry. It fits into two 19-inch server racks like those found in data centers throughout the world. The compact, self-sustained device demonstrates how this technology will soon be more accessible.

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18.06.2021
17:33 Phys.org Compact quantum computer for server centers

Quantum computers developed to date have been one-of-a-kind devices that fill entire laboratories. Now, physicists at the University of Innsbruck have built a prototype of an ion trap quantum computer that can be used in industry. It fits into two 19-inch server racks like those found in data centers throughout the world. The compact, self-sustained device demonstrates how this technology will soon be more accessible.

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