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Quantum computing

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15.05.2019
01:01 ScienceDaily.comGenerating high-quality single photons for quantum computing

Researchers have designed a way to generate, at room temperature, more single photons for carrying quantum information. The design, they say, holds promise for the development of practical quantum computers.

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14.05.2019
22:18 Technology.orgGenerating high-quality single photons for quantum computing

MIT researchers have designed a way to generate, at room temperature, more single photons for carrying quantum information.

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15:08 Phys.orgGenerating high-quality single photons for quantum computing

MIT researchers have designed a way to generate, at room temperature, more single photons for carrying quantum information. The design, they say, holds promise for the development of practical quantum computers.

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13.05.2019
23:38 ScienceDaily.comQuantum world-first: Researchers reveal accuracy of two-qubit calculations in silicon

Engineers have measured the accuracy of silicon two-qubit operations for the first time -- and their results confirm the promise of silicon for quantum computing.

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18:24 Nature.ComFidelity benchmarks for two-qubit gates in silicon

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18:04 Phys.orgQuantum world-first—researchers reveal accuracy of two-qubit calculations in silicon

For the first time ever, researchers have measured the fidelity—that is, the accuracy—of two-qubit logic operations in silicon, with highly promising results that will enable scaling up to a full-scale quantum processor.

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09.05.2019
14:00 TechnologyReview.comThe new benchmark quantum computers must beat to achieve quantum supremacy

Physicists are confident that a quantum computer will soon outperform the world’s most powerful supercomputer. To prove it, they have developed a test that will pit one against the other.

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08.05.2019
16:38 Phys.orgResearchers violate Bell's inequality with remotely connected superconducting qubits

The efficient generation of entanglement between remote quantum nodes is a crucial step in securing quantum communications. In past research, entanglement has often been achieved using a number of different probabilistic schemes.

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07.05.2019
22:59 Photonics.comGraphene-Based Logic Gate Could Support Photonic Quantum Computing

Physicists from the University of Vienna and the Institute of Photonic Sciences have shown that graphene structures can be tailored to enable single photons to interact with one another. Their findings have led them to propose a new potential architecture for a two-photon logic gate for quantum computing. Logic gates — the devices that allow one photon to change the state of a second photon — will be needed in large numbers to build a photonic quantum computer. One way to achieve this is to build gates using a nonlinear material in which two photons can interact. However, standard nonlinear materials are too inefficient to be used for this purpose. Schematic of a graphene-based two-photon gate. Courtesy of University of Vienna/Thomas Rögelsperger. A team led by professor Philip Walther proposes to use graphene to create a quantum logic gate. The team further proposes to enhance

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16:28 Optics and Photonics NewsQuantum Computing: Will It Work, and When?

A CLEO workshop explored the long road ahead in the quest for universal, fault-tolerant quantum computers—and what they might be good for if and when they come about.

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13:50 Phys.orgQuantum computing with graphene plasmons

A novel material that consists of a single sheet of carbon atoms could lead to new designs for optical quantum computers. Physicists from the University of Vienna and the Institute of Photonic Sciences in Barcelona have shown that tailored graphene structures enable single photons to interact with each other. The proposed new architecture for quantum computer is published in the recent issue of npj Quantum Information.

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06.05.2019
19:56 ScienceDaily.comQuantum computing with graphene plasmons

A novel material that consists of a single sheet of carbon atoms could lead to new designs for optical quantum computers. Physicists have shown that tailored graphene structures enable single photons to interact with each other.

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19:49 Technology.orgResearchers take a bottom-up approach to synthesizing microscopic diamonds for bioimaging, quantum computing

Scientists are excited about diamonds — not the types that adorn jewelry, but the microscopic variety that are

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17:09 Phys.orgNew holographic technique opens the way for quantum computation

Photography measures how much light of different color hits the photographic film. However, light is also a wave, and is therefore characterized by the phase. Phase specifies the position of a point within the wave cycle and correlates to depth of information, meaning that recording the phase of light scattered by an object can retrieve its full 3-D shape, which cannot be obtained with a simple photograph. This is the basis of optical holography, popularized by fancy holograms in sci-fi movies like Star Wars.

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15:55 Nanowerk.comQuantum computing with graphene plasmons

In their proposed graphene quantum logic gate, scientists show that if single plasmons are created in nanoribbons made out of graphene, two plasmons in different nanoribbons can interact through their electric fields.

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15:50 ScienceDaily.comNew holographic technique opens the way for quantum computation

Physicists have developed a method based on the principles of holograms to capture 3D images of objects beyond the reach of light.

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11:49 Technology.orgResearchers take a bottom-up approach to synthesizing microscopic diamonds for bioimaging, quantum computing

Scientists are excited about diamonds — not the types that adorn jewelry, but the microscopic variety that are

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03.05.2019
22:39 Nanowerk.comResearchers take a bottom-up approach to synthesizing nanodiamonds for bioimaging, quantum computing

Researchers used extremely high pressure and temperature to dope nanodiamonds. They used this approach to dope nanodiamonds with silicon, causing the diamonds to glow a deep red - a property that would make them useful for cell and tissue imaging.

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21:04 Phys.orgBottom-up approach can synthesize microscopic diamonds for bioimaging, quantum computing

Scientists are excited about diamonds—not the types that adorn jewelry, but the microscopic variety that are less than the width of a human hair. These so-called "nanodiamonds" are made up almost entirely of carbon. But by introducing other elements into the nanodiamond's crystal lattice—a method known as "doping"—researchers could produce traits useful in medical research, computation and beyond.

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02.05.2019
15:08 Phys.orgPhonon-mediated quantum state transfer and remote qubit entanglement

Quantum information platforms are based on qubits that talk to each other and photons (optical and microwave) are the carrier of choice—to date, to transfer quantum states between qubits. However, in some solid-state systems, acoustic vibrational properties of the material themselves known as phonons can be advantageous. In a recent study published on Science Advances, B. Bienfait and colleagues at the interdisciplinary departments of Molecular Engineering, Physics and Materials Science in the U.S. described the deterministic emission and capture of travelling (itinerant) phonons through an acoustic communication channel, to allow phonon-based coherent transfer of quantum states.

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29.04.2019
17:22 Photonics.comNanomechanical Router Could Open Way for Scalable Quantum Networks

University of Copenhagen researchers have developed a nanocomponent that emits photons carrying quantum information. The component, called a nanomechanical router, emits quantum information carried by photons and routes the photons in different directions inside a photonic chip. The microscopic-size component could provide a way to scale up quantum technology. The router is based on two coupled waveguides whose distance is adjusted on demand by an external voltage. The researchers showed controllable two-port routing of single photons emitted from quantum dots embedded in the same chip. They observed a maximum splitting ratio >23  decibels (dB), a low insertion loss of 0.67 dB, and a response time below 1 microsecond (μs). A new component, called a nanomechanical router, emits quantum information carried by photons and routes the photons into different directions inside a

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02:19 Futurity.orgDevice offers cool new way to work with qubits

A new device for controlling and measuring qubits inside a cooler environment could let quantum computers tackle more complex problems.

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25.04.2019
18:24 Photonics.comInnovations in Quantum Computing, Brain Imaging Among Highlights of CLEO 2019

Scalable quantum computing. Multiphoton microscopy for noninvasive brain imaging. The latest chapter on laser-matter interactions. These subjects and more are among the highlights of CLEO 2019, which is set to convene May 5-10 at the San Jose McEnery Convention Center. CLEO highlights the latest applications, market-ready technologies, and cutting-edge research in all areas of lasers and photonics with six days of technical sessions, tutorials, exhibits, special symposia, short courses, plenary sessions, and other special events. San Jose McEnery Convention Center. Courtesy of San Jose Convention & Visitors Bureau. Plenary speakers will include Chris Xu, professor of applied and engineering physics at Cornell University, founding co-director of Cornell Neurotech, and director of Cornell NeuroNex Hub, an NSF funded center for developing and disseminating neurotechnology. Xu’s

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24.04.2019
17:40 QuantaMagazine.orgA New Approach to Multiplication Opens the Door to Better Quantum Computers

Quantum computers can’t selectively forget information. A new algorithm for multiplication shows a way around that problem.

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19.04.2019
16:35 LiveScience.comThis Quantum Computer Can See the Future — All 16 of Them

This quantum computer can see many futures at once.

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17.04.2019
19:01 ScienceDaily.comWorld-record quantum computing

A world-record result in reducing errors in semiconductor electron 'spin qubits', a type of building block for quantum computers, has been achieved.

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17:42 Phys.orgImproving quantum computers

For decades, experts have predicted that quantum computers will someday perform difficult tasks, such as simulating complex chemical systems, that can't be done by conventional computers. But so far, these machines haven't lived up to their potential because of error-prone hardware. That's why scientists are working to improve the qubit—the basic hardware element of quantum computers, according to an article in Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society.

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16:43 Phys.orgWorld-record quantum computing result for Sydney teams

A world-record result in reducing errors in semiconductor 'spin qubits', a type of building block for quantum computers, has been achieved using the theoretical work of quantum physicists at the University of Sydney Nano Institute and School of Physics.

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16:31 Phys.orgResearchers use noise data to increase reliability of quantum computers

A new technique by researchers at Princeton University, University of Chicago and IBM significantly improves the reliability of quantum computers by harnessing data about the noisiness of operations on real hardware. In a paper presented this week, researchers describe a novel compilation method that boosts the ability of resource-constrained and "noisy" quantum computers to produce useful answers. Notably, the researchers demonstrated a nearly three times average improvement in reliability for real-system runs on IBM's 16-qubit quantum computer, improving some program executions by as much as eighteen-fold.

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12.04.2019
10:09 Phys.orgResearch provides speed boost to quantum computers

A new finding by researchers at the University of Chicago promises to improve the speed and reliability of current and next generation quantum computers by as much as ten times. By combining principles from physics and computer science, the researchers developed a new scalable compiler that makes software aware of the underlying quantum hardware, offering significant performance benefits as scientists race to build the first practical quantum computers.

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11.04.2019
19:44 ScienceDaily.comNew algorithm optimizes quantum computing problem-solving

Researchers have developed an algorithm that enhances the ability of a quantum computer to more efficiently find the best solution for complicated problems.

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10.04.2019
16:28 Phys.orgNew algorithm optimizes quantum computing problem-solving

Tohoku University researchers have developed an algorithm that enhances the ability of a Canadian-designed quantum computer to more efficiently find the best solution for complicated problems, according to a study published in the journal Scientific Reports.

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08.04.2019
16:50 Phys.orgResearch team expands quantum network with successful long-distance entanglement experiment

Scientists from the U.S. Department of Energy's Brookhaven National Laboratory, Stony Brook University, and DOE's Energy Sciences Network (ESnet) are collaborating on an experiment that puts U.S. quantum networking research on the international map. Researchers have built a quantum network testbed that connects several buildings on the Brookhaven Lab campus using unique portable quantum entanglement sources and an existing DOE ESnet communications fiber network—a significant step in building a large-scale quantum network that can transmit information over long distances.

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27.03.2019
02:44 Futurity.orgHere’s a better way to measure atomic qubits

A more accurate way to measure qubits, the basic unit of information in quantum computers, could be a big step forward.

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26.03.2019
17:26 Phys.orgIn the future, everyone might use quantum computers

Computers were once considered high-end technology, only accessible to scientists and trained professionals. But there was a seismic shift in the history of computing during the second half of the 1970s. It wasn't just that machines became much smaller and more powerful—though, of course, they did. It was the shift in who would use computers and where: They became available to everyone to use in their own home.

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00:32 Nanowerk.comExtremely accurate measurements of atom states for quantum computing

A new method allows the quantum state of atomic qubits to be measured with twenty times less error than was previously possible, without losing any atoms.

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25.03.2019
23:18 ScienceDaily.comExtremely accurate measurements of atom states for quantum computing

A new method allows the quantum state of atomic 'qubits'--the basic unit of information in quantum computers -- to be measured with twenty times less error than was previously possible, without losing any atoms.

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20:17 Phys.orgExtremely accurate measurements of atom states for quantum computing

A new method allows the quantum state of atomic "qubits"—the basic unit of information in quantum computers—to be measured with twenty times less error than was previously possible, without losing any atoms. Accurately measuring qubit states, which are analogous to the one or zero states of bits in traditional computing, is a vital step in the development of quantum computers. A paper describing the method by researchers at Penn State appears March 25, 2019 in the journal Nature Physics.

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21.03.2019
22:52 Photonics.comQuantum Dots Create Distance Between Electron Spins for Quantum Computing

Scientists at the Niels Bohr Institute have realized the swap of electron spins between distant quantum dots. This is significant for future quantum communications because it will allow the distance between the quantum dots to be large enough for integration with traditional microelectronics and, perhaps, a future quantum computer. The Copenhagen team collaborated with researchers at Purdue University and the University of Sydney to make the discovery. One method of storing and exchanging quantum information is through electron spin states, where the electrons’ charge and spin is manipulated by gate-voltage pulses. It was believed that this method can only work if quantum dots touch each other. If the dots are squeezed too close together, the spins will react too violently; if placed too far apart, the spins will interact too slowly. Both fast spin exchange and enough room

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20.03.2019
12:46 Technology.orgScientists used quantum computing to improve radars by a factor of 10

Radars are very important to our civilization. Military uses them as well as air traffic control system and

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19.03.2019
18:29 ScienceDaily.comComputer program developed to find 'leakage' in quantum computers

A new computer program that spots when information in a quantum computer is escaping to unwanted states will give users of this promising technology the ability to check its reliability without any technical knowledge for the first time.

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17:01 Phys.orgComputer program developed to find 'leakage' in quantum computers

A new computer program that spots when information in a quantum computer is escaping to unwanted states will give users of this promising technology the ability to check its reliability without any technical knowledge for the first time.

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18.03.2019
18:32 Yahoo SciencePhysicists Reverse Time for Tiny Particles Inside a Quantum Computer

Time goes in one direction: forward. Little boys become old men but not vice versa; teacups shatter but never spontaneously reassemble. This cruel and immutable property of the universe, called the "arrow of time," is fundamentally a consequence of the second law of thermodynamics, which dictates that systems will always tend to become more disordered over time. But recently, researchers from the U.S. and Russia have bent that arrow just a bit -- at least for subatomic particles.In the new study, published Tuesday (Mar. 12) in the journal Scientific Reports, researchers manipulated the arrow of time using a very tiny quantum computer made of two quantum particles, known as qubits, that performed calculations. [Twisted Physics: 7 Mind-Blowing Findings]At the subatomic scale, where the odd rules of quantum mechanics

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14:10 Space.comPhysicists Reverse Time for Tiny Particles Inside a Quantum Computer

The "arrow of time" went backward inside this tiny quantum computer.

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17.03.2019
17:08 SingularityHub.ComFinally, Proof That Quantum Computing Can Boost Machine Learning

Quantum supremacy sounds like something out of a Marvel movie. But for scientists working at the forefront of quantum computing, the hope—and hype—of this fundamentally different method of processing information is very real. Thanks to the quirky properties of quantum mechanics (here’s a nifty primer), quantum computers have the potential to massively speed up certain […]

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15.03.2019
15:33 LiveScience.comPhysicists Reverse Time for Tiny Particles Inside a Quantum Computer

The "arrow of time" went backward inside this tiny quantum computer.

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14.03.2019
17:04 ScienceDaily.comResearchers reverse the flow of time on IBM's quantum computer

Researchers have managed to return a computer briefly to the past. The results suggest new paths for exploring the backward flow of time in quantum systems. They also open new possibilities for quantum computer program testing and error correction.

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16:03 CosmosMagazine.comResearchers send qubit back in time

Experiment reveals the possibility that an electron in space might ‘spontaneously localise into its recent past’. Samantha Page reports.

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14:56 TechnologyReview.comNo, IBM didn’t just “reverse time” with a quantum computer

Amazing headlines about time machines are a long way off the mark, sadly.

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09:05 Technology.orgResearchers reverse the flow of time on IBM’s quantum computer

Quantum simulation gives a sneak peek into the possibilities of time reversal. We all mark days with clocks

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13.03.2019
21:26 NewScientist.ComIBM made a quantum algorithm that could make AI more powerful

Artificial intelligence can automatically sort out data, but it struggles for some particularly complex datasets – a quantum algorithm could do better

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21:08 TechnologyReview.comQuantum computing should supercharge this machine-learning technique

Certain machine-learning tasks could be revolutionized by more powerful quantum computers.

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17:20 SingularityHub.ComIBM Introduces ‘Quantum Volume’ to Track Progress Towards the Quantum Age

Quantum computing companies are racing to squeeze ever more qubits into their devices, but is this really a solid sign of progress? IBM is proposing a more holistic measure it calls “quantum volume” (QV) that it says gives a better indication of how close we are to practical devices. Creating quantum computers that can solve […]

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14:39 Phys.orgPhysicists reverse time using quantum computer

Researchers from the Moscow Institute of Physics and Technology teamed up with colleagues from the U.S. and Switzerland and returned the state of a quantum computer a fraction of a second into the past. They also calculated the probability that an electron in empty interstellar space will spontaneously travel back into its recent past. The study is published in Scientific Reports.

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11.03.2019
19:03 Phys.orgOpening the path to scaling silicon quantum computers

Research collaboration between UNSW and the University of Sydney has overcome a fundamental hurdle to building quantum computers in silicon, opening the way to further develop the machines at scale.

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12:39 TechnologyReview.comThere’s a new way to break quantum cryptography

Quantum communication promises a perfectly secure way to transmit private messages—in theory. The reality is turning out to be somewhat different.

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08.03.2019
13:22 Technology.orgCan entangled qubits be used to probe black holes?

Physicists have used a seven-qubit quantum computer to simulate the scrambling of information inside a black hole, heralding

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06.03.2019
22:05 ScienceDaily.comCan entangled qubits be used to probe black holes?

Information escapes from black holes via Hawking radiation, so it should be possible to capture it and use it to reconstruct what fell in: if given time longer than the age of the universe. However, if information is scrambled rapidly when it falls in, it may be possible to resurrect it by capturing Hawking radiation from entangled qubits. Physicists confirmed scrambling in a quantum computer, based on predictions by theorists.

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22:03 Photonics.comNew Approach to Measuring Large-Scale Photonic Correlation at Single-Photon Level Could Enable Photon-Based Quantum Computing

One challenge to making photon-based quantum computing practical is finding a way to manipulate and measure the thousands of qubits that are needed to process extremely large data sets. A multi-institutional research team has now demonstrated a way to map and measure large-scale photonic quantum correlation with single-photon sensitivity. In addition to the new measurement technique, which is called correlation on spatially mapped photon-level image (COSPLI), the researchers also developed a way to detect signals from single photons and their correlations in tens of millions of images. When qubits are photons, their number can be increased by increasing the number of modes encoded in the photonic degrees of freedom,that is, the polarization, frequency, time, and location measured for each photon. This increases the number of qubits without the need to use more photons,

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21:12 Phys.orgCan entangled qubits be used to probe black holes?

Physicists have used a seven-qubit quantum computer to simulate the scrambling of information inside a black hole, heralding a future in which entangled quantum bits might be used to probe the mysterious interiors of these bizarre objects.

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11:53 Technology.orgIBM Q System One quantum computing on a Raspberry Pi?

IBM Q System One: the world’s first commercial, integrated, universal, approximate quantum computing system… …on a Raspberry Pi? What

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05.03.2019
19:46 ScienceDaily.comNew hurdle cleared in race toward quantum computing

Researchers have created a new device that allows them to probe the interference of quasiparticles, potentially paving the way for the development of topological qubits.

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17:11 Phys.orgIBM announces that its System Q One quantum computer has reached its 'highest quantum volume to date'

IBM has announced at this year's American Physical Society meeting that its System Q One quantum computer has reached its "highest quantum volume to date"—a measure that the computer has doubled in performance in each of the past two years, the company reports.

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14:52 Nanowerk.comNew hurdle cleared in race toward quantum computing

Fractional Quantum Hall quasiparticles experimentally shown to interfere.

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04.03.2019
14:07 TechnologyReview.comIBM has come up with a new way of measuring the progress of quantum computers

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01.03.2019
01:39 ScienceDaily.comMoving closer to practical photonic quantum computing

For the first time, researchers have demonstrated a way to map and measure large-scale photonic quantum correlation with single-photon sensitivity. The ability to measure thousands of instances of quantum correlation is critical for making photon-based quantum computing practical.

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28.02.2019
21:36 TechnologyReview.comIntel’s “cryoprober” for qubit testing could get quantum computers here faster

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18:08 Phys.orgResearchers move closer to practical photonic quantum computing

For the first time, researchers have demonstrated a way to map and measure large-scale photonic quantum correlation with single-photon sensitivity. The ability to measure thousands of instances of quantum correlation is critical for making photon-based quantum computing practical.

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16:08 CosmosMagazine.comCoding drops quantum computing error rate by order of magnitude

Australian breakthrough brings workable quantum computers a big step closer. Alan Duffy reports.

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14:55 Phys.orgImmunizing quantum computers against errors

Building a quantum computer requires reckoning with errors—in more than one sense. Quantum bits, or "qubits," which can take on the logical values zero and one simultaneously, and thus carry out calculations faster, are extremely susceptible to perturbations. A possible remedy for this is quantum error correction, which means that each qubit is represented redundantly in several copies, such that errors can be detected and eventually corrected without disturbing the fragile quantum state of the qubit itself. Technically, this is very demanding. However, several years ago, an alternative proposal suggested storing information not in several redundant qubits, but rather in the many oscillatory states of a single quantum harmonic oscillator. The research group of Jonathan Home, professor at the Institute for Quantum Electronics at ETH Zurich, has now realised such a qubit encoded in an

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27.02.2019
21:47 ScienceDaily.comImmunizing quantum computers against errors

Researchers have used trapped calcium ions to demonstrate a new method for making quantum computers immune to errors. To do so, they created a periodic oscillatory state of an ion that circumvents the usual limits to measurement accuracy.

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21:26 Nature.ComEncoding a qubit in a trapped-ion mechanical oscillator

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26.02.2019
18:25 SingularityHub.ComQuantum Computing, Now and In the (Not Too Distant) Future

Fifty years ago, smartphones would have been the ultimate computing wizardry. Just as classical computers were almost unimaginable to previous generations, we’re now facing the birth of an entirely new type of computation, something so mystical it may as well be magic: quantum computing. If the word “quantum” makes your head spin, you’re not alone. […]

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22.02.2019
20:10 Yahoo ScienceCalculating Quantum Computing's Future

Calculating Quantum Computing's Future

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15.02.2019
17:30 Phys.orgLaser pulses light the way to tuning topological materials for spintronics and quantum computing

Scientists at the U.S. Department of Energy's Ames Laboratory have discovered a means of controlling the surface conductivity of a three-dimensional (3-D) topological insulator, a type of material that has potential applications in spintronic devices and quantum computing.

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14.02.2019
12:34 Nanowerk.comTaking diamond qubits for a spin

Scientists use implanted silicon ions and electricity to increase the spin time of quantum bits, moving closer to the tech needed for quantum networks.

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12.02.2019
21:00 ScienceDaily.comQuestions in quantum computing: How to move electrons with light

To design future quantum technologies, scientists pinpoint how microwaves interact with matter.

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15:46 Phys.orgQuestions in quantum computing—how to move electrons with light

Electronics rely on the movement of negatively-charged electrons. Physicists strive to understand the forces that push these particles into motion, with the goal of harnessing their power in new technologies. Quantum computers, for instance, employ a fleet of precisely controlled electrons to take on goliath computational tasks. Recently, researchers at the Okinawa Institute of Science and Technology Graduate University (OIST) demonstrated how microwaves cut in on the movements of electrons. The findings may contribute to future quantum computing technology.

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01.02.2019
16:57 Phys.orgScientists 'hijack' open-access quantum computer to tease out quantum secrets

The rules of quantum mechanics describe how atoms and molecules act very differently from the world around us. Scientists have made progress toward teasing out these rules—essential for finding ways to make new molecules and better technology—but some are so complex that they evade experimental verification.

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31.01.2019
20:40 TechnologyReview.comExplainer: What is a quantum computer?

How it works, why it’s so powerful, and where it’s likely to be most useful first

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29.01.2019
00:12 Phys.orgInterdisciplinary UA researchers get tangled up in quantum computing

Good neighbors often share resources: a cup of sugar, extra lawn chairs, a set of jumper cables. Researchers across campus at the University of Arizona will soon be able to share a less common—and far more valuable—resource to help them further their research: entangled photons, or interlinked pairs of light particles.

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25.01.2019
22:38 NewScientist.ComBattling AI algorithm tested on a quantum computer for first time

One of the most powerful techniques in machine learning, generative adversarial networks, has been tested on a quantum computer for the first time

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17:59 Phys.orgIBM launches commercial quantum computing – we're not ready for what comes next

IBM recently unveiled what it claimed was the world's first commercial quantum computer. While the announcement of the Q System One wasn't scientifically groundbreaking, the fact that IBM sees this as a commercial product that organisations (if not individuals) will want to use is an important breakthrough.

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17.01.2019
13:35 TechnologyReview.comWe’d have more quantum computers if it weren’t so hard to find the damn cables

Quantum machines will deliver the next great leap forward in computing, but researchers building them can’t easily get some of the exotic components they need.

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11.01.2019
18:14 Phys.orgQuantum computer: We're planning to create one that acts like a brain

The human brain has amazing capabilities making it in many ways more powerful than the world's most advanced computers. So it's not surprising that engineers have long been trying to copy it. Today, artificial neural networks inspired by the structure of the brain are used to tackle some of the most difficult problems in artificial intelligence (AI). But this approach typically involves building software so information is processed in a similar way to the brain, rather than creating hardware that mimics neurons.

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09.01.2019
18:24 NewScientist.ComIntel’s quest to build the world’s first true quantum computer

James Clarke, of Intel’s quantum computing research team, tells New Scientist about his ambitions to make the first device with a million qubits

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18:24 NewScientist.ComIBM unveils its first commercial quantum computer

IBM's sleek-looking Q System One is its first commercial quantum computer. It will be available for clients to access over the internet

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08.01.2019
20:59 TechnologyReview.comIBM has unveiled a super-cool quantum computer that you’ll never get to see

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19:36 NewScientist.ComQuantum network joins four people together for encrypted messaging

A multi-user quantum network shows that secure quantum links between several people at once could be possible using standard telecommunications equipment

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19:36 NewScientist.ComIntel’s quest to build the world’s first true quantum computer

James Clarke, of Intel’s quantum computing research team, tells New Scientist about his ambitions to make the first device with a million qubits

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19:36 NewScientist.ComIBM unveils its first commercial quantum computer

IBM's sleek-looking Q System One is its first commercial quantum computer. It will be available for clients to access over the internet

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19:09 Yahoo ScienceIBM unveils world s first commercial quantum computer

IBM has unveiled the world's first commercial quantum computer in a breakthrough that could someday lead to PCs that are millions of times faster than a regular machines.  Named the IBM Q System One, the supercomputer was unveiled this week at the Consumer Electronics Show (CES) in an airtight 9-foot cube made from half-inch thick glass.  The IBM Q uses theories of physics to create computing techniques that are far more powerful than current devices. While real-world applications of quantum computing is still some way off, the technology could be used to revolutionise fields including medicine, artificial intelligence, financial markets and online security. IBM's new computer, based in Ploughskeepsie, New York, will be the first time a quantum system has been open for

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10:33 Technology.orgQuantum computing steps further ahead with new projects at Sandia

Quantum computing is a term that periodically flashes across the media sky like heat lightning in the desert:

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02.01.2019
18:25 Yahoo ScienceThe Unlikely Origins of the First Quantum Computer

Within days of each other back in 1998, two teams published the results of the first real-world quantum computations. But the first quantum computers weren’t computers at all. They were biochemistry equipment, relying on the same science as MRI machines.

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17:35 Nanowerk.comQuantum chemistry on quantum computers

A quantum algorithm for tracking complex chemical reactions with neither performing demanding post-Hartree-Fock calculations nor exponential time explosion.

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16:10 Phys.orgQuantum chemistry on quantum computers

Quantum computing and quantum information processing technology have attracted attention in recently emerging fields. Among many important and fundamental issues in science, solving the Schroedinger equation (SE) of atoms and molecules is one of the ultimate goals in chemistry, physics and their related fields. SE is the first principle of non-relativistic quantum mechanics, whose solutions, termed wave functions, can afford any information of electrons within atoms and molecules, predicting their physicochemical properties and chemical reactions.

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16:04 Photonics.comSystem Uses QD Array to Tackle Scalability Issues in Quantum Computing

A research team led by the RIKEN Center for Emergent Matter Science (CEMS) has constructed a hybrid device for quantum computing, made from two different types of qubits, each with distinct advantages. The new system can be quickly initialized and read out, while simultaneously maintaining high control fidelity. In 1998, Daniel Loss, one of the authors of the current study, proposed, along with David DiVincenzo of IBM, to build a quantum computer by using the spins of electrons embedded in a quantum dot. The first type of qubit used for the new system — a single-spin qubit called a Loss-DiVincenzo (LD) qubit — has high control fidelity, which makes it good for calculations. It also has a long decoherence time, so that it will stay in a given state for a relatively long time before losing its signal to the environment. The downside of the LD qubit is that it cannot be

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10:05 Technology.orgPhysicists record “lifetime” of graphene qubits

Researchers from MIT and elsewhere have recorded, for the first time, the “temporal coherence” of a graphene qubit

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09:34 Gizmag Physicists measure how long graphene qubits hover in "alive/dead" superposition


Practical quantum computers may be another step closer to reality – and like so many technologies, we have graphene to thank for it. The bits of information in quantum computers (qubits) can famously exist in two states at once, and now researchers from MIT and other institutions have managed to record just how long that superposition state can last in a qubit made of graphene.
.. Continue Reading Physicists measure how long graphene qubits hover in "alive/dead" superposition Category: Quantum Computing Tags: Graphene Materials MIT Quantum Computing Quantum Physics Qubit superconductor

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06:18 ScienceDaily.comPhysicists record 'lifetime' of graphene qubits

Researchers have recorded, for the first time, quantum coherence of a graphene-based superconducting qubit, meaning how long it stays in superposition to compute with two logical states simultaneously. The work is a key step forward for practical quantum computing.

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