Keyword: quantum

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  • Our quantum problem

    09/29/2014 4:34:42 PM PDT · by LibWhacker · 33 replies
    Aeon ^ | 1/28/14 | Adrian Kent
    In 1909, Ernest Rutherford, Hans Geiger and Ernest Marsden took a piece of radium and used it to fire charged particles at a sheet of gold foil. They wanted to test the then-dominant theory that atoms were simply clusters of electrons floating in little seas of positive electrical charge (the so-called ‘plum pudding’ model). What came next, said Rutherford, was ‘the most incredible event that has ever happened to me in my life’. Despite the airy thinness of the foil, a small fraction of the particles bounced straight back at the source – a result, Rutherford noted, ‘as incredible as...
  • The Quantum Cheshire Cat: Can neutrons be located at a different place than their own spin?

    08/10/2014 8:20:11 AM PDT · by LibWhacker · 13 replies
    PhysOrg ^ | 7/29/14
    The Quantum Cheshire Cat: Can neutrons be located at a different place than their own spin? Jul 29, 2014 Enlarge The basic idea of the Quantum Cheshire Cat: In an interferometer, an object is separated from one if its properties -- like a cat, moving on a different path than its own grin. Credit: TU Vienna / Leon Filter The Cheshire Cat featured in Lewis Caroll's novel "Alice in Wonderland" is a remarkable creature: it disappears, leaving its grin behind. Can an object be separated from its properties? It is possible in the quantum world. In an experiment, neutrons travel...
  • Quantum Computing's 'Weird Magical Ingredient' Revealed

    06/12/2014 6:24:21 PM PDT · by BenLurkin · 9 replies
    hngn.com ^ | Jun 12, 2014 01:40 PM EDT | Rebekah Marcarelli
    An aspect of quantum theory called contextuality is crucial for achieving universal quantum computation, a University of Waterloo Institute of Quantum Computing news release reported. ... Quantum devices are almost impossible to build because they need to operate in a noise-resistant environment. The "magic" is a new approach to building a noise-resistant quantum computer. The process is known as magic-state distillation. By identifying this "magic" state researchers could be closer to achieving a universal quantum computer. ... In the real world measurements look at the property of something but in quantum terms what is observed really depends on how the...
  • Proving uncertainty: First rigorous formulation supporting Heisenberg's famous 1927 principle

    04/29/2014 10:27:28 AM PDT · by Red Badger · 27 replies
    Phys.Org ^ | 04-29-2014 | Provided by American Institute of Physics
    Nearly 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. In the Journal of Mathematical Physics, the researchers reports a new way of defining measurement errors that is applicable in the quantum domain and enables a precise characterization of the fundamental limits of the information accessible in quantum experiments. Quantum mechanics requires that we devise approximate joint measurements because the theory itself prohibits simultaneous ideal measurements of position...
  • Evidence of young universe's growth spurt is discovered

    03/18/2014 1:56:49 AM PDT · by blueplum · 21 replies
    Los Angeles Times ^ | March 17, 2014 11:56pm | Amina Khan
    Researchers focusing on gravitational waves find the first direct evidence for the theory of cosmic inflation, a faster-than-light expansion just after the big bang. Scientists staring at the faint afterglow from the universe's birth 13.8 billion years ago have discovered the first direct evidence for the theory of cosmic inflation the mysterious and violent expansion after the big bang. The findings, made using radio telescopes at the South Pole, support the idea that our known cosmos make up just a tiny fragment in a much larger, unknown frontier that extends far beyond the reaches of light. During this period...
  • How to see quantum gravity in Big Bang traces

    09/30/2013 11:28:55 PM PDT · by LibWhacker · 11 replies
    Nature ^ | 9/27/13 | Ron Cowen
    The cosmic microwave background sky, here mapped by NASA's Wilkinson Microwave Anisotropy Probe, has a polarization, represented by white bars. Future experiments might measure the polarization with enough sensitivity to prove the existence of gravitons, the quanta of gravity. Can a quantum of gravity ever be detected? Two physicists suggest that it can using the entire Universe as a detector. Researchers think that the gravitational force is transmitted by an elementary particle called the graviton, just as the electromagnetic force is carried by photons. But most of them despair about ever recording individual gravitons. That is because gravity is...
  • Scientists create never-before-seen form of matter (light sabers, anyone?)

    09/25/2013 3:40:05 PM PDT · by LibWhacker · 42 replies
    Phys.org ^ | 9/25/13
    Scientists create never-before-seen form of matter Photons with strong mutual attraction in a quantum nonlinear medium. Harvard and MIT scientists are challenging the conventional wisdom about light, and they didn't need to go to a galaxy far, far away to do it. Working with colleagues at the Harvard-MIT Center for Ultracold Atoms, a group led by Harvard Professor of Physics Mikhail Lukin and MIT Professor of Physics Vladan Vuletic have managed to coax photons into binding together to form molecules a state of matter that, until recently, had been purely theoretical. The work is described in a September 25...
  • A Jewel at the Heart of Quantum Physics

    09/19/2013 5:59:05 AM PDT · by LibWhacker · 40 replies
    SimonsFoundation.org ^ | 9/17/13 | Natalie Wolchover
    A Jewel at the Heart of Quantum Physics Artists rendering of the amplituhedron, a newly discovered mathematical object resembling a multifaceted jewel in higher dimensions. Encoded in its volume are the most basic features of reality that can be calculated the probabilities of outcomes of particle interactions. Physicists have discovered a jewel-like geometric object that dramatically simplifies calculations of particle interactions and challenges the notion that space and time are fundamental components of reality.This is completely new and very much simpler than anything that has been done before, said Andrew Hodges, a mathematical physicist at Oxford University who has...
  • Black Holes Feed On Quantum Foam, Says Cosmologist

    09/12/2013 6:29:02 PM PDT · by LibWhacker · 43 replies
    Nobody knows how the universe’s biggest black holes grow so large. Now one astrophysicist says it’s because they feed on the quantum foam that makes up the fabric of spacetime One of the more fascinating astrophysical discoveries in recent years is that almost all galaxies hide supermassive black holes at their cores. Indeed, astronomers believe that galaxies and black holes have a kind of symbiotic relationship so that one cannot form or grow without the other. The evidence comes from observations of galaxies both near and far—almost all contain huge black holes. But that raises an interesting question. We see...
  • Scientists manage to study the physics that connect the classical [to] the quantum world

    09/09/2013 4:10:37 PM PDT · by LibWhacker · 11 replies
    Phys.org ^ | 9/9/13
    Scientists manage to study the physics that connect the classical the quantum world 10 hours ago Enlarge Principle of the experiment: In the beginning the atom cloud is prepared in an almost perfectly ordered quantum state (symbolized by gray atoms). Over time, this quantum order is lost and disorder spreads through the system with a certain well-defined velocity (symbolized by the mixture of red and gray atoms). This disorder can be associated with the emergence of a temperature. The initial quantum properties are lost only through interactions between the atoms, without any influence from the outside world. How does a...
  • Quantum steps towards the Big Bang

    09/03/2013 5:19:44 PM PDT · by LibWhacker · 27 replies
    A new approach to the unification of general theory of relativity and quantum theory Present-day physics cannot describe what happened in the Big Bang. Quantum theory and the theory of relativity fail in this almost infinitely dense and hot primal state of the universe. Only an all-encompassing theory of quantum gravity which unifies these two fundamental pillars of physics could provide an insight into how the universe began. Scientists from the Max Planck Institute for Gravitational Physics (Albert Einstein Institute) in Golm/Potsdam and the Perimeter Institute in Canada have made an important discovery along this route. According to their theory,...
  • Lawrence Krauss: Quantum Computing Explained (YouTube video, 3min52sec)

    09/02/2013 7:23:01 PM PDT · by LibWhacker · 10 replies
    Video here. (Duration: 3 minutes, 52 seconds)
  • Engage! Warp Drive Could Become Reality with Quantum-Thruster Physics

    08/24/2013 8:14:33 PM PDT · by LibWhacker · 42 replies
    Space.com ^ | 8/21/13 | Miriam Kramer
    DALLAS Warp-drive technology, a form of "faster than light" travel popularized by TV's "Star Trek," could be bolstered by the physics of quantum thrusters another science-fiction idea made plausible by modern science. NASA scientists are performing experiments that could help make warp drive a possibility sometime in the future from a lab built for the Apollo program at NASA's Johnson Space Center in Houston. A warp-drive-enabled spacecraft would look like a football with two large rings fully encircling it. The rings would utilize an exotic form of matter to cause space-time to contract in front of and expand...
  • Quantum transistors at room temp

    06/24/2013 11:38:53 AM PDT · by ShadowAce · 8 replies
    The Register ^ | 24 June 2013 | Richard Chirgwin
    The world might still be 20 years from the end of Moore's Law, but the hunt for technologies to replace semiconductors is going on right now. A group from Michigan Technological University is offering one such alternative: a quantum tunnelling transistor that operates at room temperature. The culmination of work begun in 2007, their demonstration has been published in Advanced Materials, here (abstract). Moore's famous observation (the number of transistors on an IC doubles roughly every two years) is one day going to run into two physical constraints: the feature size of the transistor, and its ability to dissipate heat....
  • Government Lab Reveals It Has Operated Quantum Internet for Over Two Years

    05/06/2013 6:00:49 PM PDT · by LibWhacker · 38 replies
    Government Lab Reveals It Has Operated Quantum Internet for Over Two Years A quantum internet capable of sending perfectly secure messages has been running at Los Alamos National Labs for the last two and a half years, say researchers One of the dreams for security experts is the creation of a quantum internet that allows perfectly secure communication based on the powerful laws of quantum mechanics.The basic idea here is that the act of measuring a quantum object, such as a photon, always changes it. So any attempt to eavesdrop on a quantum message cannot fail to leave telltale signs...
  • Astrophysics: Fire in the hole! (Black hole firewalls, relativity vs. quantum mechanics)

    04/05/2013 5:46:23 PM PDT · by LibWhacker · 24 replies
    Nature ^ | 4/3/13 | Zeeya Merali
    n March 2012, Joseph Polchinski began to contemplate suicide at least in mathematical form. A string theorist at the Kavli Institute for Theoretical Physics in Santa Barbara, California, Polchinski was pondering what would happen to an astronaut who dived into a black hole. Obviously, he would die. But how? According to the then-accepted account, he wouldnt feel anything special at first, even when his fall took him through the black holes event horizon: the invisible boundary beyond which nothing can escape. But eventually after hours, days or even weeks if the black hole was big enough he...
  • Chinese Physicists Measure Speed of Spooky Action At a Distance

    03/07/2013 11:41:49 PM PST · by Bobalu · 48 replies
    Physics arXiv Blog ^ | March 7, 2013 | Physics arXiv Blog
    Einstein railed against the possibility of spooky action at a distance because it violates relativity. Now Chinese physicists have clocked it traveling more than four orders of magnitude faster than light
  • Quantum theory is wrong.

    03/07/2013 5:44:05 AM PST · by ABrit · 62 replies
    A word in your ear ^ | March 7th 2013 | Mark
    Particles do not retain "information", don't have "knowledge". It is not that the act of observation that alters reality. In fact the physical nature of the "observation" small though it may be is sufficient to alter the metrics of sub atomic particles.
  • Do we live in a computer simulation? UW researchers say idea can be tested

    12/11/2012 8:54:00 AM PST · by LibWhacker · 58 replies
    University of Washington ^ | 12/10/12 | Vince Stricherz
    A decade ago, a British philosopher put forth the notion that the universe we live in might in fact be a computer simulation run by our descendants. While that seems far-fetched, perhaps even incomprehensible, a team of physicists at the University of Washington has come up with a potential test to see if the idea holds water. The concept that current humanity could possibly be living in a computer simulation comes from a 2003 paper published in Philosophical Quarterly by Nick Bostrom, a philosophy professor at the University of Oxford. In the paper, he argued that at least one of...
  • Manipulators of the Quantum Realm Reap Nobel Glory

    10/09/2012 11:43:46 AM PDT · by neverdem · 14 replies
    ScienceNOW ^ | 9 October 2012 | Adrian Cho
    Enlarge Image Light touch. Serge Haroche and David Wineland (right) won the Nobel for their work manipulating the quantum states of individual atoms. Credit: CNRS and NIST The past couple of decades have witnessed a sea change in quantum physics. Previously, scientists relied on the strange rules of quantum theory mainly to explain the odd natural behavior of masses of atoms and other quantum particles such as photons. Increasingly, however, physicists are exploiting those rules to create delicate quantum states of individual particles and to do novel things with them. This year's Nobel Prize in physics honors two experimenters...
  • The Nobel Prize in Physics 2012 Haroche, David J. Wineland (France and USA)

    10/09/2012 3:40:47 AM PDT · by AdmSmith · 28 replies
    The Royal Swedish Academy of Sciences ^ | 9 oct 2012 | The Royal Swedish Academy of Sciences
    The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics for 2012 to Serge Haroche Collge de France and Ecole Normale Suprieure, Paris, France and David J. Wineland National Institute of Standards and Technology (NIST) and University of Colorado Boulder, CO, USA "for ground-breaking experimental methods that enable measuring and manipulation of individual quantum systems" Particle control in a quantum world Serge Haroche and David J. Wineland have independently invented and developed methods for measuring and manipulating individual particles while preserving their quantum-mechanical nature, in ways that were previously thought unattainable.
  • Quantum causal relations: A causes B causes A

    10/03/2012 4:33:24 PM PDT · by LibWhacker · 48 replies
    EurekAlert ^ | 10/2/12
    One of the most deeply rooted concepts in science and in our everyday life is causality; the idea that events in the present are caused by events in the past and, in turn, act as causes for what happens in the future. If an event A is a cause of an effect B, then B cannot be a cause of A. Now theoretical physicists from the University of Vienna and the Universit Libre de Bruxelles have shown that in quantum mechanics it is possible to conceive situations in which a single event can be both, a cause and an effect...
  • Scientific (Quantum) Immortality

    09/06/2012 10:51:02 AM PDT · by EveningStar · 32 replies
    The Freehold ^ | September 6, 2012 | Jonathan David Baird
    I have long been fascinated by the idea that the universe is not actually a singular object but made up of a multiverse of infinite universes. Each of these Universes is seemingly branch off at every possible action or inaction. This idea is staggering in its immensity. It seems like science fiction and it has certainly been a staple of science fiction for at least forty years. It may have remained science fiction but fortunately I am not alone in believing this might in fact be possible.
  • 10-year-old problem in theoretical computer science falls

    07/31/2012 11:57:26 AM PDT · by LibWhacker · 17 replies
    MIT News Office ^ | 7/31/12 | Larry Hardesty
    Interactive proofs mathematical games that underlie much modern cryptography work even if players try to use quantum information to cheat.Interactive proofs, which MIT researchers helped pioneer, have emerged as one of the major research topics in theoretical computer science. In the classic interactive proof, a questioner with limited computational power tries to extract reliable information from a computationally powerful but unreliable respondent. Interactive proofs are the basis of cryptographic systems now in wide use, but for computer scientists, theyre just as important for the insight they provide into the complexity of computational problems. Twenty years ago, researchers showed...
  • Is Space Digital?

    02/03/2012 5:46:10 AM PST · by LibWhacker · 7 replies · 1+ views
    Scientific American ^ | 1/17/12 | Michael Moyer
    An experiment going up outside of Chicago will attempt to measure the intimate connections among information, matter and spacetime. If it works, it could rewrite the rules for 21st-century physicsCraig Hogan believes that the world is fuzzy. This is not a metaphor. Hogan, a physicist at the University of Chicago and director of the Fermilab Particle Astrophysics Center near Batavia, Ill., thinks that if we were to peer down at the tiniest subdivisions of space and time, we would find a universe filled with an intrinsic jitter, the busy hum of static. This hum comes not from particles bouncing...
  • Here come the quantum dot TVs and wallpaper

    12/14/2011 1:12:13 AM PST · by LibWhacker · 35 replies · 2+ views
    PhysOrg ^ | 12/13/11 | Nancy Owano
    (PhysOrg.com) -- A British firm's quantum dot technology will be used for flat screen TVs and flexible screens, according to the companys chief executive.The quantum dots will be in use for ultra thin, light flat screen TVs by the end of next year, and, in another three years, will be used in flexible screens rolled up like paper or used as wall coverings. The company, Nanoco Group, is reportedly working with Asian electronics companies to bring this technology to market. The first products we are expecting to come to market using quantum dots will be the next generation of flat-screen...
  • Multi-purpose photonic chip paves the way to programmable quantum processors

    12/12/2011 7:57:29 AM PST · by LibWhacker · 11 replies
    PhysOrg ^ | 12/11/11
    Artists impression of the quantum photonic chip, showing the waveguide circuit (in white), and the voltage-controlled phase shifters (metal contacts on the surface). Photon pairs become entangled as they pass through the circuit. The fundamental resource that drives a quantum computer is entanglementthe connection between two distant particles which Einstein famously called 'spooky action at a distance'. The Bristol researchers have, for the first time, shown that this remarkable phenomenon can be generated, manipulated and measured entirely on a tiny silica chip. They have also used the same chip to measure mixturean often unwanted effect from the environment, but...
  • Quantum theorem shakes foundations

    11/18/2011 5:52:08 AM PST · by ShadowAce · 86 replies
    Nature ^ | 17 November 2011 | Eugenie Samuel Reich
    At the heart of the weirdness for which the field of quantum mechanics is famous is the wavefunction, a powerful but mysterious entity that is used to determine the probabilities that quantum particles will have certain properties. Now, a preprint posted online on 14 November1 reopens the question of what the wavefunction represents with an answer that could rock quantum theory to its core. Whereas many physicists have generally interpreted the wavefunction as a statistical tool that reflects our ignorance of the particles being measured, the authors of the latest paper argue that, instead, it is physically real. I...
  • Quantum levitating (locking) video goes viral

    10/19/2011 7:01:34 AM PDT · by Red Badger · 36 replies
    http://www.physorg.com ^ | 18 October 2011 | Bob Yirka
    A video created by researchers at Tel Aviv University in Israel has the Internet buzzing. Though rather simple, it just looks really cool, hence all the attention. Its a demonstration of quantum locking, though to non-science buffs, it looks more like science fiction come to life. In the video a disc, obviously frozen due to the vapor rising from its surface hovers over a surface. This is nothing new of course, everyones seen it in science class. What is new is that when the demonstrator turns the disc, it stays hovered at that angle. This is in contrast to the...
  • Quantum life: The weirdness inside us

    10/08/2011 11:36:11 AM PDT · by Reeses · 30 replies
    NewScientist ^ | October 6, 2011 | Michael Brooks
    Ever felt a little incoherent? Or maybe you've been in two minds about something, or even in a bit of delicate state. Well, here's your excuse: perhaps you are in thrall to the strange rules of quantum mechanics. We tend to think that the interaction between quantum physics and biology stops with Schrdinger's cat. Not that Erwin Schrdinger intended his unfortunate feline - suspended thanks to quantum rules in a simultaneous state of being both dead and alive - to be anything more than a metaphor. Indeed, when he wrote his 1944 book What is Life?, he speculated that living...
  • Rush for rare earth may create Nebraska boomtown

    08/02/2011 5:57:55 PM PDT · by jazusamo · 51 replies
    The Washington Times ^ | August 2, 2011 | Claire Courchane
    Elk Creek, Neb. (population 112), may not be so tiny much longer. Reports suggest that the southeastern Nebraska hamlet may be sitting on the worlds largest untapped deposit of rare earth minerals, which have proved to be indispensable to a slew of high-tech and military applications such as laser pointers, stadium lighting, electric car batteries and sophisticated missile-guidance systems. Canada-based Quantum Rare Earths Developments Corp. last week received preliminary results from test drilling in the area, showing significant proportions of rare earth minerals and niobium. The only people more excited than Quantum? The residents of Elk Creek, where nearly one...
  • Super-Small Transistor Created: Artificial Atom Powered by Single Electrons

    04/18/2011 12:57:55 PM PDT · by Red Badger · 10 replies
    Science Daily ^ | 04-18-2011 | University of Pittsburgh
    A University of Pittsburgh-led team has created a single-electron transistor that provides a building block for new, more powerful computer memories, advanced electronic materials, and the basic components of quantum computers. The researchers report in Nature Nanotechnology that the transistor's central component -- an island only 1.5 nanometers in diameter -- operates with the addition of only one or two electrons. That capability would make the transistor important to a range of computational applications, from ultradense memories to quantum processors, powerful devices that promise to solve problems so complex that all of the world's computers working together for billions of...
  • As if Quantum Teleportation Weren't Spooky Enough, Physicists Propose 'Time Teleportation'

    01/18/2011 12:20:07 PM PST · by Nachum · 98 replies
    Popular Science ^ | 1/18/11 | Clay Dillow
    As if the idea ideas of quantum entanglement and time travel werent difficult enough to wrap ones head around separately, two physicists at the Universtiy of Queensland in Australia have further compounded the headache by merging the two ideas via a new kind of quantum entanglement that links particles not across space, but across time. Quantum entanglement is that spooky action (Einsteins words, not ours) that links two particles such that a measurement on one immediately influences the state of the other, even if the two particles are separated by miles, or even light years. Entanglement defies the intuitive way...
  • The Secret Financial Network Behind "Wizard" George Soros

    11/12/2010 2:50:25 AM PST · by bronxville · 66 replies
    Questions Questions Doc. ^ | November 1st, 1996 | William Engdahl
    The Secret Financial Network Behind "Wizard" George Soros by William Engdahl EIR Investigation Executive Intelligence Review (EIR), November 1, 1996 The dossier that follows is based upon a report released on Oct. 1 by EIR's bureau in Wiesbaden, Germany, titled "A Profile of Mega-Speculator George Soros." Research was contributed by Mark Burdman, Elisabeth Hellenbroich, Paolo Raimondi, and Scott Thompson. ......................................................... Time magazine has characterized financier George Soros as a "modern-day Robin Hood," who robs from the rich to give to the poor countries of eastern Europe and Russia. It claimed that Soros makes huge financial gains by speculating against western...
  • Computers set for quantum leap

    09/16/2010 4:43:02 PM PDT · by AU72 · 42 replies
    Financial Times ^ | 09/16/10 | Clive Cookson
    A new photonic chip that works on light rather than electricity has been built by an international research team, paving the way for the production of ultra-fast quantum computers with capabilities far beyond todays devices. Future quantum computers will, for example, be able to pull important information out of the biggest databases almost instantaneously. As the amount of electronic data stored worldwide grows exponentially, the technology will make it easier for people to search with precision for what they want. EDITORS CHOICE Making sense of a nonsensical world - Sep-16 Fears over computers impact on lives - Sep-14 Brain scan...
  • Rethinking Einstein: The end of space-time

    08/09/2010 7:25:58 AM PDT · by LibWhacker · 43 replies
    NewScientist ^ | 8/9/10 | Anil Ananthaswamy
    Physicists struggling to reconcile gravity with quantum mechanics have hailed a theory inspired by pencil lead that could make it all very simpleIT WAS a speech that changed the way we think of space and time. The year was 1908, and the German mathematician Hermann Minkowski had been trying to make sense of Albert Einstein's hot new idea - what we now know as special relativity - describing how things shrink as they move faster and time becomes distorted. "Henceforth space by itself and time by itself are doomed to fade into the mere shadows," Minkowski proclaimed, "and...
  • Quantum time machine 'allows paradox-free time travel'

    07/26/2010 1:28:23 AM PDT · by LibWhacker · 43 replies · 1+ views
    Telegraph ^ | 7/22/10 | Tom Chivers
    Quantum physicists at the Massachusetts Institute of Technology believe it is possible to create a time machine which could affect the past without creating a "grandfather paradox".Scientists have for some years been able to 'teleport' quantum states from one place to another. Now Seth Lloyd and his MIT team say that, using the same principles and a further strange quantum effect known as 'postselection', it should be possible to do the same backwards in time. Lloyd told the Technology Review: "It is possible for particles (and, in principle, people) to tunnel from the future to the past."
  • Quantum mechanics flummoxes physicists again

    07/24/2010 5:35:11 PM PDT · by LibWhacker · 82 replies · 3+ views
    Nature ^ | 7/22/10 | Jon Cartwright
    A fresh take on a classic experiment makes no progress in unifying quantum mechanics and relativity. If you ever want to get your head around the riddle that is quantum mechanics, look no further than the double-slit experiment. This shows, with perfect simplicity, how just watching a wave or a particle can change its behaviour. The idea is so unpalatable to physicists that they have spent decades trying to find new ways to test it. The latest such attempt, by physicists in Europe and Canada, used a three-slit version but quantum mechanics won out again. In the standard double-slit...
  • Latest Physics Theories May Help Challenge Evolution

    03/30/2010 8:53:37 AM PDT · by nysuperdoodle · 85 replies · 1,787+ views
    ECR/Technology Review ^ | 30 Mar 10 | EC
    The latest theories on the nature and origin of gravity are generating lots of interest from those looking to unify the various systems (Einsteinian, Newtonian, Quantum, String Theory) of looking at our universe, and bringing to the forefront the importance of the second law of thermodynamics as an organizing principle in our universe. The problem is that the second law of thermodynamics and evolution are pretty much incompatible, as EC explains...
  • Gravity Emerges from Quantum Information, Say Physicists

    03/27/2010 11:06:22 AM PDT · by LibWhacker · 70 replies · 1,508+ views
    The new role that quantum information plays in gravity sets the scene for a dramatic unification of ideas in physics One of the hottest new ideas in physics is that gravity is an emergent phenomena; that it somehow arises from the complex interaction of simpler things. A few month's ago, Erik Verlinde at the the University of Amsterdam put forward one such idea which has taken the world of physics by storm. Verlinde suggested that gravity is merely a manifestation of entropy in the Universe. His idea is based on the second law of thermodynamics, that entropy always increases over...
  • Scientists supersize quantum mechanics

    03/18/2010 9:10:58 PM PDT · by LibWhacker · 28 replies · 720+ views
    Nature ^ | 3/17/10 | Geoff Brumfiel
    Largest ever object put into quantum state.A team of scientists has succeeded in putting an object large enough to be visible to the naked eye into a mixed quantum state of moving and not moving. Andrew Cleland at the University of California, Santa Barbara, and his team cooled a tiny metal paddle until it reached its quantum mechanical 'ground state' the lowest-energy state permitted by quantum mechanics. They then used the weird rules of quantum mechanics to simultaneously set the paddle moving while leaving it standing still. The experiment shows that the principles of quantum mechanics can apply...
  • Can we detect quantum behavior in viruses?

    03/11/2010 7:21:37 AM PST · by decimon · 16 replies · 404+ views
    Institute of Physics ^ | Mar 11, 2010 | Unknown
    The weird world of quantum mechanics describes the strange, often contradictory, behaviour of small inanimate objects such as atoms. Researchers have now started looking for ways to detect quantum properties in more complex and larger entities, possibly even living organisms. A German-Spanish research group, split between the Max Planck Institute for Quantum Optics in Garching and the Institute of Photonic Sciences (ICFO), is using the principles of an iconic quantum mechanics thought experiment - Schrdinger's superpositioned cat to test for quantum properties in objects composed of as many as one billion atoms, possibly including the flu virus. New research...
  • Ripping Apart Einstein

    03/07/2010 2:11:48 PM PST · by LibWhacker · 83 replies · 468+ views
    FQXI ^ | 3/7/10 | Bob Swarup
    Cutting the threads of the spacetime fabric and reinstating the aether could lead to a theory of quantum gravity.If there’s one thing Einstein taught us, it’s that time is relative. But physicist Petr Hořava is challenging this notion and tearing through the fabric of spacetime in his quest for a theory of quantum gravity. His work may also resurrect another entity that Einstein had seemingly buried—the aether. Physicists have spent decades searching for a way to reconcile the seemingly incongruous twin foundations of modern physics: quantum theory, which deals with the infinitesimally small, and Einstein’s theory of gravity, general relativity,...
  • Digital Quantum Battery Could Boost Energy Density Tenfold

    12/23/2009 8:38:17 PM PST · by LibWhacker · 9 replies · 1,055+ views
    PhysOrg ^ | 12/22/09 | Lisa Zyga
    This figure shows the energy density and the power density of nano vacuum tubes in comparison to other energy storage devices. Credit: H?bler and Osuagwu. (PhysOrg.com) -- Physicists theorize that quantum phenomena could provide a major boost to batteries, with the potential to increase energy density up to 10 times that of lithium ion batteries. According to a new proposal, billions of nanoscale capacitors could take advantage of quantum effects to overcome electric arcing, an electrical breakdown phenomenon which limits the amount of charge that conventional capacitors can store. In their study, Alfred Hubler and Onyeama Osuagwu, both of the...
  • Small nanoparticles bring big improvement to medical imaging

    11/22/2009 10:40:46 PM PST · by neverdem · 2 replies · 525+ views
    If you're watching the complex processes in a living cell, it is easy to miss something importantespecially if you are watching changes that take a long time to unfold and require high-spatial-resolution imaging. But new research* makes it possible to scrutinize activities that occur over hours or even days inside cells, potentially solving many of the mysteries associated with molecular-scale events occurring in these tiny living things. A joint research team, working at the National Institute of Standards and Technology (NIST) and the National Institute of Allergy and Infectious Diseases (NIAID), has discovered a method of using nanoparticles to illuminate...
  • The 10 weirdest physics facts, from relativity to quantum physics

    11/12/2009 7:51:26 AM PST · by LibWhacker · 63 replies · 2,263+ views
    Telegraph ^ | 11/12/09 | Tom Chivers
    People who think science is dull are wrong. Here are 10 reasons why.Physics is weird. There is no denying that. Particles that dont exist except as probabilities; time that changes according to how fast youre moving; cats that are both alive and dead until you open a box. Weve put together a collection of 10 of the strangest facts we can find, with the kind help of cosmologist and writer Marcus Chown, author of We Need To Talk About Kelvin, and an assortment of Twitter users. The humanities-graduate writer of this piece would like to stress that this is...
  • New Law of Physics Could Explain Quantum Mysteries

    08/18/2009 10:37:08 AM PDT · by LibWhacker · 86 replies · 2,439+ views
    PhysOrg ^ | 8/17/09 | Lisa Zyga
    The Invariant Set Postulate differentiates between reality and unreality, suggesting the existence of a state space, within which a smaller subset of state space (reality) is embedded. (PhysOrg.com) -- Since the early days of quantum mechanics, scientists have been trying to understand the many strange implications of the theory: superpositions, wave-particle duality, and the observers role in measurements, to name a few. Now, a new proposed law of physics that describes the geometry of physical reality on the cosmological scale might help answer some of these questions. Plus, the new law could give some clues about the role of...
  • Journeying Through the Quantum Froth

    08/09/2009 12:08:19 PM PDT · by LibWhacker · 34 replies · 1,151+ views
    FQXi ^ | 8/9/09 | Marc Kaufman & Zeeya Merali
    Are cosmic rays revealing the quantum nature of spacetime? Could theories of (not) everything help solve the puzzle of quantum gravity? The architect of doubly special relativity thinks so.In his youth, there were two things that regularly competed for Giovanni Amelino-Camelias attention: his favorite soccer team, Napoli, and "anything that came close to being scientific." And since Napoli was struggling in the Italian soccer league in the summer of 1978, Amelino-Camelia found himself watching a series of programs on special relativity instead of soccer. "That was really the point of no return for me," he remembers. "Although I was 13-years...
  • The quantum life (quantum mechanics can explain many fundamental aspects of life)

    07/19/2009 5:42:44 PM PDT · by SeekAndFind · 9 replies · 1,259+ views
    Physics World ^ | 7/15/2009 | Paul Davies
    To a physicist, life seems little short of miraculous all those stupid atoms getting together to perform such clever tricks! For centuries, living organisms were regarded as some sort of magic matter. Today, we know that no special life force is at work in biology; there is just ordinary matter doing extraordinary things, all the while obeying the familiar laws of physics. What, then, is the secret of lifes remarkable properties? In the late 1940s and 1950s it was fashionable to suppose that quantum mechanics or perhaps some soon-to-be-formulated post-quantum mechanics held the key to the mystery...
  • Quantum Mysticism: Gone but Not Forgotten

    06/08/2009 8:53:23 PM PDT · by Maelstorm · 6 replies · 474+ views
    http://www.physorg.com/ ^ | Lisa Zyga | June 8th, 2009
    In a recent paper published in the European Journal of Physics, Marin has written a short history, based on a longer analysis, of the mysticism controversy in the early quantum physics community. As Marin emphasizes, the controversy began in Germany in the 1920s among physicists in reaction to the new theory of quantum mechanics, but was much different than debates on similar issues today. At the turn of the last century, science and religion were not divided as they are today, and some scientists of the time were particularly inspired by Eastern mysticism. In his analysis, Marin lays out each...