Phys.org news tagged with:mathematical physics
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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.How mathematics reveals the nature of the cosmosLet us discuss the very nature of the cosmos. What you may find in this discussion is not what you expect. Going into a conversation about the universe as a whole, you would imagine a story full of wondrous events such as stellar collapse, galactic collisions, strange occurrences with particles, and even cataclysmic eruptions of energy. You may be expecting a story stretching the breadth of time as we understand it, starting from the Big Bang and landing you here, your eyes soaking in the photons being emitted from your screen. Of course, the story is grand. But there is an additional side to this amazing assortment of events that oftentimes is overlooked; that is until you truly attempt to understand what is going on. Behind all of those fantastic realizations, there is a mechanism at work that allows for us to discover all that you enjoy learning about. That mechanism is mathematics, and without it the universe would still be shrouded in darkness. In this article, I will attempt to persuade you that math isn't some arbitrary and sometimes pointless mental task that society makes it out to be, and instead show you that it is a language we use to communicate with the stars.
http://phys.org/news/2015-06-mathematics-reveals-nature-cosmos.html
Mathematics Mon, 08 Jun 2015 09:00:01 EDTnews352970459Video: "Speleophysicist" uses physics to study the underground flow of waterTo boldly go where no one has gone before – it's not science fiction to Matt Covington, an associate professor of geosciences at the University of Arkansas. After completing a doctoral degree in theoretical astrophysics, Covington combined his interest in caves with his education in mathematical models of physical processes. The result? Covington says he's one of the world's only speleophysicists as he uses physics to study the underground flow of water.
http://phys.org/news/2015-04-video-speleophysicist-physics-underground.html
Environment Fri, 17 Apr 2015 11:00:02 EDTnews348483455Physicists study magnetism with the roles of position and momentum reversed(Phys.org) —Normally, the strength of a magnetic field increases as you get closer to a magnet and decreases as you move further away—a concept easily understood when placing magnets near a refrigerator, for instance. But recent research has shown that exotic "momentum-space artificial magnetic fields" can be created where the strength of the magnetic field depends on how fast a particle moves, instead of where the particle is. In other words, the roles of position and momentum are swapped.
http://phys.org/news/2014-11-physicists-magnetism-roles-position-momentum.html
General Physics Thu, 20 Nov 2014 09:20:01 EDTnews335687221Fluid mechanics suggests alternative to quantum orthodoxyThe central mystery of quantum mechanics is that small chunks of matter sometimes seem to behave like particles, sometimes like waves. For most of the past century, the prevailing explanation of this conundrum has been what's called the "Copenhagen interpretation"—which holds that, in some sense, a single particle really is a wave, smeared out across the universe, that collapses into a determinate location only when observed.
http://phys.org/news/2014-09-fluid-mechanics-alternative-quantum-orthodoxy.html
Quantum Physics Fri, 12 Sep 2014 06:10:51 EDTnews329721037Strange physics turns off laserInspired by anomalies that arise in certain mathematical equations, researchers have demonstrated a laser system that paradoxically turns off when more power is added rather than becoming continuously brighter.
http://phys.org/news/2014-06-strange-physics-laser.html
Optics & Photonics Tue, 17 Jun 2014 12:11:55 EDTnews322225896Proving uncertainty: First rigorous formulation supporting Heisenberg's famous 1927 principleNearly 90 years after Werner Heisenberg pioneered his uncertainty principle, a group of researchers from three countries has provided substantial new insight into this fundamental tenet of quantum physics with the first rigorous formulation supporting the uncertainty principle as Heisenberg envisioned it.
http://phys.org/news/2014-04-uncertainty-rigorous-heisenberg-famous-principle.html
Quantum Physics Tue, 29 Apr 2014 11:53:38 EDTnews317991201Russia's Yakov Sinai wins Abel mathematics prizeRussian mathematician Yakov Sinai won the prestigious Abel mathematics prize for his work in dynamical systems and mathematical physics, the Norwegian Academy of Science and Letters said Wednesday.
http://phys.org/news/2014-03-russian-norway-million-abel-math.html
Mathematics Wed, 26 Mar 2014 09:50:02 EDTnews315045513Magic and symmetry in mathematicsWe live in a three-dimensional world. Despite the many benefits this presents, it also makes for a complicated math problem, according to Northeastern associate professor of mathematics Ivan Loseu. The best a path to a solution, he said, is reducing the number of variables we're dealing with.
http://phys.org/news/2014-03-magic-symmetry-mathematics.html
Mathematics Wed, 12 Mar 2014 06:40:02 EDTnews313824064New application of physics tools used in biologyA Lawrence Livermore National Laboratory physicist and his colleagues have found a new application for the tools and mathematics typically used in physics to help solve problems in biology.
http://phys.org/news/2014-02-application-physics-tools-biology.html
General Physics Fri, 07 Feb 2014 15:54:36 EDTnews3110108583D printing used as a tool to explain theoretical physicsStudents may soon be able to reach out and touch some of the theoretical concepts they are taught in their physics classes thanks to a novel idea devised by a group of researchers from Imperial College London.
http://phys.org/news/2013-12-3d-tool-theoretical-physics.html
Engineering Sun, 08 Dec 2013 19:00:01 EDTnews305725773Mathematical scientist suggests possible test for existence of axions(Phys.org) —A mathematical scientist with the Isaac Newton Institute for Mathematical Sciences at the University of Cambridge, has proposed a possible way to test for the existence of axions—theoretical particles that might be possible components of dark matter. In his paper published in Physical Review Letters, Christian Beck suggests it might be possible to detect the existence of axions by using a Josephson junction.
http://phys.org/news/2013-12-mathematical-scientist-axions.html
General Physics Wed, 04 Dec 2013 10:19:58 EDTnews305374780Finding Occam's razor in an era of information overloadHow can the actions and reactions of proteins so small or stars so distant they are invisible to the human eye be accurately predicted? How can blurry images be brought into focus and reconstructed?
http://phys.org/news/2013-11-occam-razor-era-overload.html
General Physics Wed, 20 Nov 2013 11:25:51 EDTnews304169141A mathematical approach to physical problems: An interview with Rupert FrankRupert Frank joined the Caltech faculty this spring as a professor of mathematics. Originally from Munich, Germany, Frank graduated from the Ludwig Maximilian University in his hometown in 2003 and his PhD from the Royal Institute of Technology in Stockholm, Sweden, in 2007. After completing a postdoctoral position at Princeton University, he was hired as an instructor there and quickly worked his way up to assistant professor. Frank recently answered a few questions about his work at the intersection of mathematics and physics.
http://phys.org/news/2013-11-mathematical-approach-physical-problems-rupert.html
Mathematics Tue, 19 Nov 2013 08:07:06 EDTnews304070816Physicists 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 EDTnews301920383New approach enhances quantum-based secure communicationUniversity of Calgary scientists have overcome an 'Achilles' heel' of quantum-based secure communication systems, using a new approach that works in the real world to safeguard secrets.
http://phys.org/news/2013-09-approach-quantum-based.html
Quantum Physics Wed, 04 Sep 2013 11:34:13 EDTnews297513235Is mathematics an effective way to describe the world?Mathematics has been called the language of the universe. Scientists and engineers often speak of the elegance of mathematics when describing physical reality, citing examples such as π, E=mc2, and even something as simple as using abstract integers to count real-world objects. Yet while these examples demonstrate how useful math can be for us, does it mean that the physical world naturally follows the rules of mathematics as its "mother tongue," and that this mathematics has its own existence that is out there waiting to be discovered? This point of view on the nature of the relationship between mathematics and the physical world is called Platonism, but not everyone agrees with it.
http://phys.org/news/2013-09-mathematics-effective-world.html
Mathematics Tue, 03 Sep 2013 13:37:50 EDTnews297434159Physics team suggests possible way to make quantum cryptography available in handheld machines(Phys.org) —A team of physicists at Bristol University in the U.K. has proposed a possible way to allow for quantum cryptography between a large station and a small hand held device. They describe such a technique in a paper they have uploaded to the preprint server arXiv.
http://phys.org/news/2013-08-physics-team-quantum-cryptography-handheld.html
Quantum Physics Fri, 30 Aug 2013 08:56:51 EDTnews297071795Physicists suggest electrical networks more at risk of cascading failure than thought(Phys.org) —A team of physicists from Israel and the U.S. has discovered that mathematical modeling suggests modern electrical networks may be more vulnerable to cascading collapse than has been previously thought. In their paper published in the journal Nature Physics, the researchers found that previous models that showed such networks to be robust were based on more randomness than is typically found in real-world networks such as the Internet and electrical systems.
http://phys.org/news/2013-08-physicists-electrical-networks-cascading-failure.html
General Physics Mon, 26 Aug 2013 09:51:51 EDTnews296729481Indian researcher helps prove math conjecture from the 1950sOn June 18, Adam Marcus and Daniel A. Spielman of Yale University, along with Nikhil Srivastava of Microsoft Research India, announced a proof of the Kadison-Singer conjecture, a question about the mathematical foundations of quantum mechanics. Ten days later, they posted, on Cornell University's arXiv open-access e-prints site, a manuscript titled Interlacing Families II: Mixed Characteristic Polynomials and The Kadison-Singer Problem.
http://phys.org/news/2013-07-indian-math-conjecture-1950s.html
Mathematics Wed, 17 Jul 2013 07:57:02 EDTnews293266602Imaging electron pairing in a simple magnetic superconductorIn the search for understanding how some magnetic materials can be transformed to carry electric current with no energy loss, scientists at the U.S. Department of Energy's Brookhaven National Laboratory, Cornell University, and collaborators have made an important advance: Using an experimental technique they developed to measure the energy required for electrons to pair up and how that energy varies with direction, they've identified the factors needed for magnetically mediated superconductivity-as well as those that aren't.
http://phys.org/news/2013-07-imaging-electron-pairing-simple-magnetic.html
Superconductivity Sun, 14 Jul 2013 13:00:09 EDTnews293009429Link between quantum physics and game theory found(Phys.org) —A deep link between two seemingly unconnected areas of modern science has been discovered by researchers from the Universities of Bristol and Geneva.
http://phys.org/news/2013-07-link-quantum-physics-game-theory.html
Quantum Physics Fri, 12 Jul 2013 12:19:53 EDTnews292850382Researchers, educators team to improve science curriculaNCBJ experts jointly with teachers and students of some Mazovia region technical high schools are running the "School with a Big Future" project. A new curricula for some nuclear-industry-related vocational programmes that are to attract more young people towards the sciences will be worked out during interactive classes held in schools and NCBJ labs in Świerk, where MARIA, the sole in Poland nuclear reactor, is operated.
http://phys.org/news/2013-07-team-science-curricula.html
Social Sciences Wed, 10 Jul 2013 06:50:01 EDTnews292656837Kenneth Wilson, Nobel winner for physics, diesA physics professor who earned a Nobel prize for pioneering work that changed the way physicists think about phase transitions has died in Maine at age 77.
http://phys.org/news/2013-06-kenneth-wilson-nobel-winner-physics.html
General Physics Tue, 18 Jun 2013 14:32:54 EDTnews290784766Pendulum swings back on 350-year-old mathematical mystery(Phys.org) —A 350-year-old mathematical mystery could lead toward a better understanding of medical conditions like epilepsy or even the behavior of predator-prey systems in the wild, University of Pittsburgh researchers report.
http://phys.org/news/2013-06-pendulum-year-old-mathematical-mystery.html
Mathematics Mon, 10 Jun 2013 12:03:54 EDTnews290084623Computer simulations shed light on how immune cells identify foreign antigensHow do immune cells manage to sort through vast numbers of similar-looking proteins within the body to detect foreign invaders and fight infections? McGill researchers used computational tools to examine what kind of solutions immune systems may use to detect small concentrations of foreign antigens (characteristic of potentially harmful infections) in a sea of "self-antigens" normally present at the surface of cells.
http://phys.org/news/2013-06-simulations-immune-cells-foreign-antigens.html
General Physics Fri, 07 Jun 2013 15:24:08 EDTnews289837413New principle sets maximum limit on quantum information communication(Phys.org) —When two parties use a quantum system to share information, the amount of quantum information that can be communicated is fundamentally limited by quantum properties. Now in a new paper, Damián Pitalúa-García, a scientist in the University of Cambridge's Centre for Quantum Information and Foundations in the Department of Applied Mathematics and Theoretical Physics, has proposed a principle that can determine the maximum amount of quantum information that a quantum system can communicate. According to this principle, the maximum amount of information is limited only by the quantum system's dimension, and does not depend on any physical resources previously shared by the communicating parties.
http://phys.org/news/2013-06-principle-maximum-limit-quantum.html
Quantum Physics Tue, 04 Jun 2013 13:00:01 EDTnews289565474New mathematical model links space-time theoriesResearchers at the University of Southampton have taken a significant step in a project to unravel the secrets of the structure of our Universe.
http://phys.org/news/2013-05-mathematical-links-space-time-theories.html
General Physics Thu, 30 May 2013 09:57:06 EDTnews289126620Researchers test quantum encryption hacking risk(Phys.org) —Quantum communication systems offer the promise of virtually unbreakable encryption. Unlike classical encryption, which is used to send secure data over networks today and whose security depends on the difficulty of solving mathematical problems like the factoring of large numbers, most quantum encryption schemes keep the encryption key separate from the data. This approach ensures that an eavesdropper with access only to the data could not decipher the key. However, researchers have recently demonstrated that even quantum encryption may be susceptible to hacking.
http://phys.org/news/2013-05-quantum-encryption-hacking.html
Quantum Physics Tue, 28 May 2013 09:41:55 EDTnews288952898Researchers explain magnetic field misbehavior in solar flaresWhen a solar flare filled with charged particles erupts from the sun, its magnetic fields sometime break a widely accepted rule of physics. The flux-freezing theorem dictates that the magnetic lines of force should flow away in lock-step with the particles, whole and unbroken. Instead, the lines sometimes break apart and quickly reconnect in a way that has mystified astrophysicists.
http://phys.org/news/2013-05-magnetic-field-misbehavior-solar-flares.html
Astronomy Wed, 22 May 2013 16:00:09 EDTnews288457198Study shows that people organize daily travel efficiently(Phys.org) —Studies of human mobility usually focus on either the small scale—determining the origins, destinations and travel modes of individuals' daily commutes—or the very large scale, such as using air-travel patterns to track the spread of epidemics over time. The large-scale studies, most of which are made possible by the vast data generated and collected by new technologies like sensors and cellphones, are very good at describing the big picture, but don't provide much detail at the individual level. Smaller-scale studies have the opposite characteristic: Their findings generally can't be scaled up from the individual to be applied broadly to populations.
http://phys.org/news/2013-05-people-daily-efficiently.html
Computer Sciences Wed, 08 May 2013 13:25:13 EDTnews287238304