Phys.org news tagged with:classical computers
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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.Study narrows the scope of research on quantum computingAccording to many scientists, quantum computers will have great importance in the future but, despite all efforts, research in this field is still in its infancy. One of the difficulties is understanding what criteria a quantum system should meet to be able to solve problems that are impossible for conventional computers. An international research team headed by SISSA has just published a study that establishes a basic characteristic that universal quantum simulators should possess.
http://phys.org/news/2014-12-narrows-scope-quantum.html
Quantum Physics Mon, 01 Dec 2014 06:55:46 EDTnews336639337New largest number factored on a quantum device is 56,153(Phys.org)—Researchers have set a new record for the quantum factorization of the largest number to date, 56,153, smashing the previous record of 143 that was set in 2012. They have shown that the exact same room-temperature nuclear magnetic resonance (NMR) experiment used to factor 143 can actually factor an entire class of numbers, although this was not known until now. Because this computation, which is based on a minimization algorithm involving 4 qubits, does not require prior knowledge of the answer, it outperforms all implementations of Shor's algorithm to date, which do require prior knowledge of the answer. Expanding on this method, the researchers also theoretically show how the same minimization algorithm can be used to factor even larger numbers, such as 291,311, with only 6 qubits.
http://phys.org/news/2014-11-largest-factored-quantum-device.html
Quantum Physics Fri, 28 Nov 2014 12:31:23 EDTnews336400271The quantum revolution is a step closerA new way to run a quantum algorithm using much simpler methods than previously thought has been discovered by a team of researchers at the University of Bristol. These findings could dramatically bring forward the development of a 'quantum computer' capable of beating a conventional computer.
http://phys.org/news/2014-09-quantum-revolution-closer.html
Quantum Physics Thu, 11 Sep 2014 12:04:06 EDTnews329655838Researcher tracks photons to develop unprecedented quantum technologyQuantum photonics research could change the way we communicate, compute, and measure phenomena on the smallest scales possible. To probe these processes and design new technology that operates with single-photon and single-electron precision, MIT physicist and professor Dirk Englund turns to the experts and instruments at Brookhaven Lab's Center for Functional Nanomaterials. Englund, who leads the Quantum Photonics Group at MIT, explores the quantum landscape with an eye on applications ranging from cryptography to neurology.
http://phys.org/news/2014-09-tracks-photons-unprecedented-quantum-technology.html
Quantum Physics Wed, 10 Sep 2014 06:50:02 EDTnews329548346Physicists aim to make transition to quantum world visibleTheoretical physicist Frank Wilhelm-Mauch and his research team at Saarland University have developed a mathematical model for a type of microscopic test lab that could provide new and deeper insight into the world of quantum particles. The new test system will enable the simultaneous study of one hundred light quanta (photons) and their complex quantum mechanical relationships ("quantum entanglement") – a far greater number than was previously possible. The researchers hope to gain new insights that will be of relevance to the development of quantum computers. They are the first group worldwide to undertake such studies using a so-called "metamaterial", a specially constructed lattice of nanostructures that is able to refract light more strongly than existing natural materials.
http://phys.org/news/2013-10-physicists-aim-transition-quantum-world.html
Quantum Physics Fri, 25 Oct 2013 11:46:43 EDTnews301920383Researchers propose a new system for quantum simulationResearchers from the universities in Mainz, Frankfurt, Hamburg and Ulm have proposed a new platform for quantum simulation. In a theoretical paper recently published in Physical Review Letters, they show that a combined system of ultracold trapped ions and fermionic atoms could be used to emulate solid state physics. This system may outperform possibilities of existing platforms as a number of phenomena found in solid state systems are naturally included, such as the fermionic statistics of the electrons and the electron-sound wave interactions.
http://phys.org/news/2013-09-quantum-simulation.html
Quantum Physics Tue, 03 Sep 2013 11:49:07 EDTnews297427729Researchers discover quantum algorithm that could improve stealth fighter design(Phys.org) —Researchers at the Johns Hopkins University Applied Physics Laboratory (APL) have devised a quantum algorithm for solving big linear systems of equations. Furthermore, they say the algorithm could be used to calculate complex measurements such as radar cross sections, an ability integral to the development of radar stealth technology, among many other applications. Their research is reported in the June 18 issue of Physical Review Letters.
http://phys.org/news/2013-08-quantum-algorithm-stealth-fighter.html
Quantum Physics Tue, 20 Aug 2013 17:27:05 EDTnews296238389Teleported by electronic circuit: Physicists 'beam' informationETH-researchers cannot "beam" objects or humans of flesh and blood through space yet, a feat sometimes alluded to in science fiction movies. They managed, however, to teleport information from A to B – for the first time in an electronic circuit, similar to a computer chip.
http://phys.org/news/2013-08-teleported-electronic-circuit-physicists.html
Quantum Physics Wed, 14 Aug 2013 14:34:16 EDTnews295709644Physicists discover atomic clock can simulate quantum magnetismResearchers at JILA have for the first time used an atomic clock as a quantum simulator, mimicking the behavior of a different, more complex quantum system.
http://phys.org/news/2013-08-physicists-atomic-clock-simulate-quantum.html
Quantum Physics Thu, 08 Aug 2013 14:00:02 EDTnews295179054MIT researchers build an all-optical transistorOptical computing—using light rather than electricity to perform calculations—could pay dividends for both conventional computers and quantum computers, largely hypothetical devices that could perform some types of computations exponentially faster than classical computers.
http://phys.org/news/2013-07-mit-all-optical-transistor.html
Quantum Physics Thu, 04 Jul 2013 18:10:25 EDTnews292180190New scheme for quantum computing(Phys.org) —Tom Wong, a graduate student in physics and David Meyer, professor of mathematics at the University of California, San Diego, have proposed a new algorithm for quantum computing, that will speed a particular type of problem. But swifter calculations would come at the cost of greater physical resources devoted to precise timekeeping, their analysis has determined.
http://phys.org/news/2013-06-scheme-quantum.html
Quantum Physics Tue, 25 Jun 2013 07:10:03 EDTnews291361757Physicists show self-correcting quantum computers are theoretically possible(Phys.org) —Using exotic components such as color codes, new phases of quantum matter, and extra dimensions, a team of physicists has shown that it's theoretically possible to construct a quantum computer that has the ability to correct itself whenever an error occurs.
http://phys.org/news/2013-06-physicists-self-correcting-quantum-theoretically.html
Quantum Physics Tue, 11 Jun 2013 11:59:34 EDTnews290170756Spintronics approach enables new quantum technologies(Phys.org) —A team of researchers including members of the University of Chicago's Institute for Molecular Engineering highlight the power of emerging quantum technologies in two recent papers published in the Proceedings of the National Academy of Sciences (PNAS). These technologies exploit quantum mechanics, the physics that dominates the atomic world, to perform disparate tasks such as nanoscale temperature measurement and processing quantum information with lasers.
http://phys.org/news/2013-06-spintronics-approach-enables-quantum-technologies.html
Quantum Physics Tue, 04 Jun 2013 16:12:11 EDTnews289581123Competition in the quantum worldInnsbruck physicists led by Rainer Blatt and Peter Zoller experimentally gained a deep insight into the nature of quantum mechanical phase transitions. They are the first scientists that simulated the competition between two rival dynamical processes at a novel type of transition between two quantum mechanical orders. They have published the results of their work in the journal Nature Physics.
http://phys.org/news/2013-05-competition-quantum-world.html
Quantum Physics Mon, 20 May 2013 05:55:55 EDTnews288248146Photonic quantum computers: A brighter future than ever(Phys.org) —Harnessing the unique features of the quantum world promises a dramatic speed-up in information processing as compared to the fastest classical machines. Scientists from the Group of Philip Walther from the Faculty of Physics, University of Vienna succeeded in prototyping a new and highly resource efficient model of a quantum computer – the boson sampling computer. The results will be published in the upcoming issue of the renowned scientific journal Nature Photonics.
http://phys.org/news/2013-05-photonic-quantum-brighter-future.html
Optics & Photonics Mon, 13 May 2013 08:20:02 EDTnews28765089016 atomic ions simulate a quantum antiferromagnet(Phys.org) —Frustration crops up throughout nature when conflicting constraints on a physical system compete with one another. The way nature resolves these conflicts often leads to exotic phases of matter that are poorly understood. This week's issue of Science Magazine features new results from the research group of Christopher Monroe at the JQI, where they explored how to frustrate a quantum magnet comprised of sixteen atomic ions – to date the largest ensemble of qubits to perform a simulation of quantum matter.
http://phys.org/news/2013-05-atomic-ions-simulate-quantum-antiferromagnet.html
Quantum Physics Fri, 03 May 2013 15:53:11 EDTnews286815176A silicon platform for quantum computersA team of Australian engineers at the University of New South Wales (UNSW) has demonstrated a quantum bit based on the nucleus of a single atom in silicon, promising dramatic improvements for data processing in ultra-powerful quantum computers of the future.
http://phys.org/news/2013-04-silicon-platform-quantum.html
Quantum Physics Wed, 17 Apr 2013 13:00:26 EDTnews285416725Researchers discover a way to avoid decoherence in a quantum system(Phys.org) —A team of physicists in Israel has used the scattering of a photon when it strikes an atom to better understand the process of decoherence. In a paper the team has published in the journal Science, the group describe how, as part of their research, they found that the spin of an atom prior to being shot with a single photon determined whether decoherence took place or not.
http://phys.org/news/2013-03-decoherence-quantum.html
Quantum Physics Fri, 08 Mar 2013 09:50:01 EDTnews281957225Quantum computing moves forwardNew technologies that exploit quantum behavior for computing and other applications are closer than ever to being realized due to recent advances, according to a review article published this week in the journal Science.
http://phys.org/news/2013-03-quantum.html
Quantum Physics Fri, 08 Mar 2013 09:18:02 EDTnews281956662Connecting (quantum) dots: Spin technique moves researchers closer to creating first viable high-speed quantum computerRecent research offers a new spin on using nanoscale semiconductor structures to build faster computers and electronics. Literally.
http://phys.org/news/2013-02-quantum-dots-technique-closer-viable.html
Nanophysics Tue, 26 Feb 2013 11:52:24 EDTnews281101926Quantum algorithm breakthroughAn international research group led by scientists from the University of Bristol, UK, and the University of Queensland, Australia, has demonstrated a quantum algorithm that performs a true calculation for the first time. Quantum algorithms could one day enable the design of new materials, pharmaceuticals or clean energy devices.
http://phys.org/news/2013-02-quantum-algorithm-breakthrough.html
Optics & Photonics Sun, 24 Feb 2013 13:00:37 EDTnews280916122Efficient distributed quantum computing(Phys.org)—A quantum computer doesn't need to be a single large device but could be built from a network of small parts, new research from the University of Bristol has demonstrated. As a result, building such a computer would be easier to achieve.
http://phys.org/news/2013-02-efficient-quantum.html
Quantum Physics Thu, 21 Feb 2013 07:52:05 EDTnews280655516Listening to electrons: New method brings scaling-up quantum devices one step closer(Phys.org)—We're now one step closer to quantum computing becoming a reality thanks to research led by a team of University of Sydney physicists, who have found a new way to detect changes in charges smaller than one electron.
http://phys.org/news/2013-02-electrons-method-scaling-up-quantum-devices.html
Quantum Physics Fri, 01 Feb 2013 06:41:58 EDTnews278923026Multiple steps toward the 'quantum singularity'In early 2011, a pair of theoretical computer scientists at MIT proposed an optical experiment that would harness the weird laws of quantum mechanics to perform a computation impossible on conventional computers. Commenting at the time, a quantum-computing researcher at Imperial College London said that the experiment "has the potential to take us past what I would like to call the 'quantum singularity,' where we do the first thing quantumly that we can't do on a classical computer."
http://phys.org/news/2013-01-multiple-quantum-singularity.html
Quantum Physics Fri, 18 Jan 2013 07:01:00 EDTnews277714838Breakthrough offers new route to large-scale quantum computing(Phys.org)—In a key step toward building a machine that promises to revolutionize computing, Princeton researchers have developed a method that could quickly and reliably transmit information through a computer using the power of subatomic particles.
http://phys.org/news/2012-11-breakthrough-route-large-scale-quantum.html
Quantum Physics Wed, 28 Nov 2012 09:18:32 EDTnews273316701Researchers show that relatively simple physical systems could yield powerful quantum computersQuantum computers are devices—still largely theoretical—that could perform certain types of computations much faster than classical computers; one way they might do that is by exploiting "spin," a property of tiny particles of matter. A "spin chain," in turn, is a standard model that physicists use to describe systems of quantum particles, including some that could be the basis for quantum computers.
http://phys.org/news/2012-11-simple-physical-yield-powerful-quantum.html
Quantum Physics Tue, 27 Nov 2012 06:31:50 EDTnews273220290Mathematician makes breakthrough in understanding of turbulence(Phys.org)—A mathematician at the University of Glasgow is helping to find an answer to one of the last unsolved problems in classical mechanics.
http://phys.org/news/2012-11-mathematician-breakthrough-turbulence.html
General Physics Thu, 15 Nov 2012 07:30:15 EDTnews272187007Researchers devise more accurate method for predicting hurricane activityResearchers from North Carolina State University have developed a new method for forecasting seasonal hurricane activity that is 15 percent more accurate than previous techniques.
http://phys.org/news/2012-09-accurate-method-hurricane.html
Earth Sciences Tue, 11 Sep 2012 11:56:00 EDTnews266583205Researchers strive to simulate turbulent combustion in aerospace applicationsA research team at the University of Pittsburgh is developing quantum-computing algorithms to better model turbulent combustion in aerospace applications.
http://phys.org/news/2012-04-simulate-turbulent-combustion-aerospace-applications.html
Quantum Physics Wed, 18 Apr 2012 17:20:38 EDTnews253988418143 is largest number yet to be factored by a quantum algorithm(Phys.org) -- While factoring an integer is a simple problem when the integer is small, the complexity of factorization greatly increases as the integer increases. When the integer grows to more than 100,000 or so digits, the problem reaches a point at which it becomes too complex to solve using classical computing methods. But quantum computers, with their use of entanglement and superposition, can theoretically factor a number of any size. However, the largest number that has been factored on a quantum processor so far is 21. Now in a new study, physicists have set a new record for quantum factorization by developing the first quantum algorithm that can factor a three-digit integer, 143, into its prime factors, 11 and 13.
http://phys.org/news/2012-04-largest-factored-quantum-algorithm.html
Quantum Physics Wed, 11 Apr 2012 14:32:42 EDTnews253373526