Phys.org news tagged with:quantum bits
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en-usPhys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.Simple is beautiful in quantum computingQuantum computing could solve problems impossible for today's supercomputers. The challenge for this new form of computing is processing the quantum bits (qubits) that represent data. A qubit can be made by controlling the orientation of an electron's spin at a defect site in diamond. To solve a problem, a quantum computer uses logic gates to couple multiple qubits and output new information. Scientists designed a new protocol that can be used to develop fast, robust logic gates for qubits. The simple gates reorient electron spin on defect sites in diamond. This new finding would allow faster and more efficient manipulation of the electron spins or qubits.
https://phys.org/news/2017-11-simple-beautiful-quantum.html
Quantum Physics Wed, 15 Nov 2017 07:59:12 ESTnews429955139IBM says it's reached milestone in quantum computingIBM has announced a milestone in its race against Google and other big tech firms to build a powerful quantum computer.
https://phys.org/news/2017-11-ibm-milestone-quantum.html
Quantum Physics Fri, 10 Nov 2017 10:31:58 ESTnews429532312Quantum computing on the moveA future quantum computer, using quantum bits, or qubits, might be able to solve problems that are not tractable for classical computers. Scientists are currently struggling to build devices with more than a few qubits, as they mutually hamper each other's proper operation.
https://phys.org/news/2017-11-quantum.html
Quantum Physics Tue, 07 Nov 2017 05:33:24 ESTnews429255166A new kind of quantum computerQuantum mechanics incorporates some very non-intuitive properties of matter. Quantum superposition, for example, allows an atom to be simultaneously in two different states with its spin axis pointed both up and down, or combinations in between. A computer that uses quantum mechanical manipulation of atoms or particles therefore has many more possible options than a conventional one that works with "zeros" and "ones" and has only two choices, called bits. A quantum computer's memory uses instead what are called quantum bits - qubits - and each qubit can be in a superposition of these two states. As a result, theoretical physicists estimate a quantum computer with only about one hundred of these qubits could in principle exceed the computing power of the powerful current classical computers. Building a quantum computer is therefore one of the main technological goals in modern physics and astrophysics.
https://phys.org/news/2017-11-kind-quantum.html
Quantum Physics Mon, 06 Nov 2017 06:39:04 ESTnews429172735A bit of a 'quantum magic trick'—experiment shows how to speed up frequency measurementAn accurate analog clock tick-tick-ticks with a constant precision and well known frequency: one tick per second. The longer you let it tick, the better to test its accuracy —10 times as long corresponds to a ten-fold improvement in any frequency uncertainty. But is there a faster way to determine a frequency?
https://phys.org/news/2017-11-bit-quantum-magic.html
Quantum Physics Thu, 02 Nov 2017 10:32:54 ESTnews428837543Researchers take a step toward quantum mechanical analysis of plant metabolismHurricanes, traffic jams, demographic development – to predict the effect of such events, computer simulations are required. Many processes in nature, however, are so complicated that conventional computers fail. Quantum simulators may solve this problem. One of the basic phenomena in nature is the interaction between light and matter in photosynthesis. Physicists of Karlsruhe Institute of Technology (KIT) have now made a big step towards quantum mechanics understanding of plant metabolism. This is reported in the Nature Communications journal.
https://phys.org/news/2017-10-quantum-mechanical-analysis-metabolism.html
Quantum Physics Tue, 17 Oct 2017 06:22:19 ESTnews427440130Flip-flop qubits: Radical new quantum computing design inventedEngineers at Australia's University of New South Wales have invented a radical new architecture for quantum computing, based on novel 'flip-flop qubits', that promises to make the large-scale manufacture of quantum chips dramatically cheaper - and easier - than thought possible.
https://phys.org/news/2017-09-flip-flop-qubits-radical-quantum.html
Quantum Physics Wed, 06 Sep 2017 05:00:01 ESTnews423891215Why you might trust a quantum computer with secrets—even over the internetHere's the scenario: you have sensitive data and a problem that only a quantum computer can solve. You have no quantum devices yourself. You could buy time on a quantum computer, but you don't want to give away your secrets. What can you do?
https://phys.org/news/2017-07-quantum-secretseven-internet.html
Quantum Physics Wed, 12 Jul 2017 09:40:22 ESTnews419071210Researchers simulate the design of new quantum bits for easier engineering of quantum computersQuantum computers—a possible future technology that would revolutionize computing by harnessing the bizarre properties of quantum bits, or qubits. Qubits are the quantum analogue to the classical computer bits "0" and "1." Engineering materials that can function as qubits is technically challenging. Using supercomputers, scientists from the University of Chicago and Argonne National Laboratory predicted possible new qubits built out of strained aluminum nitride. Moreover, the scientists showed that certain newly developed qubits in silicon carbide have unusually long lifetimes.
https://phys.org/news/2017-01-simulate-quantum-bits-easier.html
Quantum Physics Tue, 24 Jan 2017 09:30:01 ESTnews404471537Fast track control accelerates switching of quantum bitsFrom laptops to cellphones, today's technology advances through the ever-increasing speed at which electric charges are directed through circuits. Similarly, speeding up control over quantum states in atomic and nanoscale systems could lead to leaps for the emerging field of quantum technology.
https://phys.org/news/2016-12-fast-track-quantum-bits.html
Quantum Physics Thu, 15 Dec 2016 12:30:48 ESTnews401027437Atomic-scale MRI holds promise for new drug discoveryResearchers at the University of Melbourne have developed a way to radically miniaturise a Magnetic Resonance Imaging (MRI) machine using atomic-scale quantum computer technology.
https://phys.org/news/2016-10-atomic-scale-mri-drug-discovery.html
General Physics Tue, 11 Oct 2016 15:14:17 ESTnews395417649Electron spins talk to each other via a 'quantum mediator'The unparalleled possibilities of quantum computers are currently still limited because information exchange between the bits in such computers is difficult, especially over larger distances. FOM workgroup leader Lieven Vandersypen and his colleagues within the QuTech research centre and the Kavli Institute for Nanosciences (Delft University of Technology) have succeeded for the first time in enabling two non-neighbouring quantum bits in the form of electron spins in semiconductors to communicate with each other. They publish their research on 10 October in Nature Nanotechnology.
https://phys.org/news/2016-10-electron-quantum.html
Nanophysics Mon, 10 Oct 2016 11:00:02 ESTnews395300585Researchers prevent quantum errors from occurring by continuously watching a quantum systemA team of scientists led by Tim Taminiau of QuTech, the quantum institute of TU Delft and TNO, has now experimentally demonstrated that errors in quantum computations can be suppressed by repeated observations of quantum bits.
https://phys.org/news/2016-10-quantum-errors.html
Quantum Physics Fri, 07 Oct 2016 08:41:21 ESTnews395048474Realizing quantum bitsIn computers of the future, information might be stored in the form of quantum bits. But how can a quantum bit be realised?
https://phys.org/news/2016-07-quantum-bits.html
Quantum Physics Tue, 26 Jul 2016 07:42:39 ESTnews388737746Russian physicists discover a new approach for building quantum computersPhysicists from MIPT and the Russian Quantum Center have developed an easier method to create a universal quantum computer using multilevel quantum systems (qudits), each one of which is able to work with multiple "conventional" quantum elements – qubits.
https://phys.org/news/2016-07-russian-physicists-approach-quantum.html
Quantum Physics Mon, 25 Jul 2016 06:53:52 ESTnews388648415New device lengthens the life of quantum informationYale University scientists have reached a milestone in their efforts to extend the durability and dependability of quantum information.
https://phys.org/news/2016-07-yale-developed-device-lengthens-life-quantum.html
Quantum Physics Wed, 20 Jul 2016 13:00:17 ESTnews388238023Could aluminum nitride be engineered to produce quantum bits?Quantum computers have the potential to break common cryptography techniques, search huge datasets and simulate quantum systems in a fraction of the time it would take today's computers. But before this can happen, engineers need to be able to harness the properties of quantum bits or qubits.
https://phys.org/news/2016-05-aluminum-nitride-quantum-bits.html
Quantum Physics Tue, 03 May 2016 06:08:40 ESTnews381474487Scientists develop long-range secure quantum communication systemA group of scientists from ITMO University in Saint Petersburg, Russia has developed a novel approach to the construction of quantum communication systems for secure data exchange. The experimental device based on the results of the research is capable of transmitting single-photon quantum signals across distances of 250 kilometers or more, which is on par with other cutting edge analogues. The research paper was published in the Optics Express journal.
https://phys.org/news/2016-04-scientists-long-range-quantum.html
Quantum Physics Wed, 13 Apr 2016 06:20:01 ESTnews379746517Protected Majorana states for quantum informationQuantum technology has the potential to revolutionize computation, cryptography, and simulation of quantum systems. However, quantum physics places a new demand on information processing hardware: quantum states are fragile, and so must be controlled without being measured. Researchers at the Niels Bohr Institute have now demonstrated a key property of Majorana zero modes that protects them from decoherence. The result lends positive support to the existence of Majorana modes, and goes further by showing that they are protected, as predicted theoretically. The results have been published in the prestigious scientific magazine, Nature.
https://phys.org/news/2016-03-majorana-states-quantum.html
Quantum Physics Wed, 09 Mar 2016 13:00:08 ESTnews376734675Quantum computer factors numbers, could be scaled upWhat are the prime factors, or multipliers, for the number 15? Most grade school students know the answer—3 and 5—by memory. A larger number, such as 91, may take some pen and paper. An even larger number, say with 232 digits, can (and has) taken scientists two years to factor, using hundreds of classical computers operating in parallel.
https://phys.org/news/2016-03-quantum-factors-scaled.html
Quantum Physics Thu, 03 Mar 2016 14:00:01 ESTnews376233645Researchers develop error correction method for quantum computing based on Majorana fermionsTheoretical physicists at MIT recently reported a quantum computer design featuring an array of superconducting islands on the surface of a topological insulator. They propose basing both quantum computation and error correction on the peculiar behavior of electrons at neighboring corners of these islands and their ability to interact across islands at a distance. "The lowest energy state of this system is a very highly entangled quantum state, and it is this state that can be used to encode and manipulate qubits," says graduate student Sagar Vijay, lead co-author of the paper on the proposed system, with senior author Liang Fu, associate professor of physics at MIT, and Timothy H. Hsieh PhD '15. As Vijay explains it, the proposed system can encode logical qubits that can be read by shining light on them. At the simplest level of explanation, the system can characterize the state of a quantum bit as a zero or a one based on whether there is an odd or even number of electrons associated with a superconducting quantum bit, but the underlying physical interactions that allow this are highly complex.
https://phys.org/news/2016-02-error-method-quantum-based-majorana.html
Quantum Physics Mon, 15 Feb 2016 07:18:39 ESTnews374743096Quantum computer coding in silicon now possibleA team of Australian engineers has proven—with the highest score ever obtained—that a quantum version of computer code can be written, and manipulated, using two quantum bits in a silicon microchip. The advance removes lingering doubts that such operations can be made reliably enough to allow powerful quantum computers to become a reality.
https://phys.org/news/2015-11-quantum-coding-silicon.html
Quantum Physics Mon, 16 Nov 2015 11:51:38 ESTnews366897089Scientists design full-scale architecture for quantum computer in siliconAustralian scientists have designed a 3D silicon chip architecture based on single atom quantum bits, which is compatible with atomic-scale fabrication techniques - providing a blueprint to build a large-scale quantum computer.
https://phys.org/news/2015-10-scientists-full-scale-architecture-quantum-silicon.html
Quantum Physics Fri, 30 Oct 2015 14:00:02 ESTnews365401207Crucial hurdle overcome in quantum computingThe significant advance, by a team at the University of New South Wales (UNSW) in Sydney appears today in the international journal Nature.
https://phys.org/news/2015-10-crucial-hurdle-quantum.html
Quantum Physics Mon, 05 Oct 2015 11:02:21 ESTnews363261731Team finds the 'key' to quantum network solutionScientists at the University of York's Centre for Quantum Technology have made an important step in establishing scalable and secure high rate quantum networks.
https://phys.org/news/2015-05-team-key-quantum-network-solution.html
Quantum Physics Mon, 25 May 2015 11:00:09 ESTnews351766740New chip architecture may provide foundation for quantum computerQuantum computers are in theory capable of simulating the interactions of molecules at a level of detail far beyond the capabilities of even the largest supercomputers today. Such simulations could revolutionize chemistry, biology and material science, but the development of quantum computers has been limited by the ability to increase the number of quantum bits, or qubits, that encode, store and access large amounts of data.
https://phys.org/news/2015-05-chip-architecture-foundation-quantum.html
Quantum Physics Tue, 05 May 2015 11:00:03 ESTnews350040441Quantum teleportation on a chipThe core circuits of quantum teleportation, which generate and detect quantum entanglement, have been successfully integrated into a photonic chip by an international team of scientists from the universities of Bristol, Tokyo, Southampton and NTT Device Technology Laboratories. These results pave the way to developing ultra-high-speed quantum computers and strengthening the security of communication.
https://phys.org/news/2015-04-quantum-teleportation-chip.html
Quantum Physics Wed, 01 Apr 2015 10:59:43 ESTnews347104777Researchers find qubits based on trapped ions offer a promising scalable platform for quantum computing(Phys.org) —A team of researchers working at the University of Oxford has found that quantum bits (qubits) based on trapped calcium ions can be both manipulated and fashioned to store qubits with higher fidelity than any other method seen thus far. In their paper published in Physical Review Letters, the team describes how they built a means for testing the feasibility of using Ca+ ions as the basis for quantum computing and what they found in doing so.
https://phys.org/news/2014-11-qubits-based-ions-scalable-platform.html
Quantum Physics Wed, 26 Nov 2014 08:30:01 ESTnews336209367Simon's algorithm run on quantum computer for the first time—faster than on standard computer(Phys.org) —A team of researchers working in South Africa has reported that they've successfully run Simon's algorithm on a quantum computer for the first time. In their paper published in Physical Review Letters, the team describes how they ran the algorithm, the results they found and what doing so means for the future of quantum computing.
https://phys.org/news/2014-11-simon-algorithm-quantum-timefaster-standard.html
Quantum Physics Mon, 17 Nov 2014 10:17:20 ESTnews335441832Quantum computing poised for new silicon revolutionA dramatic increase in the amount of time data can be stored on a single atom means silicon could once again play a vital role in the development of super-fast computers.
https://phys.org/news/2014-10-quantum-poised-silicon-revolution.html
Quantum Physics Tue, 14 Oct 2014 06:09:40 ESTnews332485768