Posts tagged "physics"

• A quantum network built with two atoms and fiber optic cable →

  

  In an ordinary computer network, data in the form of binary numbers are transferred from one machine (node) to another via some sort of electronic signal, either electrical or optical. The success of this transfer comes when the recipient has precisely the same set of binary figures that were sent. In a quantum network, the “data” is a quantum state—the particular configuration of an atom’s energy, spin, etc.—and the transfer of information is successful if the state is reproduced in a separate quantum system some distance away.

  quantum computers future research physics networks
  1 year ago reblog like 8 notes
• Researchers find a way to keep quantum memory and logic in synch →

  

  A quantum computer, like any other computer, requires a way to store and retrieve information. In other words, some sort of memory. But because of the rich quantum entanglement gooey center of quantum computing, the memory and the logic need to be linked in a manner that’s very different from that in classical computing: the magic of entanglement.

  quantum physics computers research future data
  1 year ago reblog like 10 notes
• Quantum information motion control is now improved →

  Physicists have recently devised a new method for handling the effect of the interplay between vibrations and electrons on electronic transport. Their paper is about to be published in The European Physical Journal B. This study, led by scientists from Zhejiang University, Hangzhou, China, and the Centre for Computational Science and Engineering at the National University of Singapore, could have implications for quantum computers due to improvements in the transport of discrete amounts of information, known as qubits, that are encoded in electrons.

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  1 year ago reblog like 10 notes
• Ultracold experiments heat up quantum research →

  

  University of Chicago physicists have experimentally demonstrated, for the first time, that atoms chilled to temperatures near absolute zero may behave like seemingly unrelated natural systems of vastly different scales, offering potential insights into links between the atomic realm and deep questions of cosmology.

  This ultracold state, called “quantum criticality,” hints at similarities between such diverse phenomena as the gravitational dynamics of black holes or the exotic conditions that prevailed at the birth of the universe, said Cheng Chin, associate professor in physics at UChicago. The results could even point to ways of simulating cosmological phenomena of the early universe by studying systems of atoms in states of quantum criticality.

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• For designer molecules, trick the electrons →

  

  Scientists have created the first-ever system of “designer electrons”—exotic variants of ordinary electrons with tunable properties.

  electrons physics molecules future graphene
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• Scientists discover a surprising new way that protons can move among molecules →

  

  When a proton – the bare nucleus of a hydrogen atom – transfers from one molecule to another, or moves within a molecule, the result is a hydrogen bond, in which the proton and another atom like nitrogen or oxygen share electrons. Conventional wisdom has it that proton transfers can only happen using hydrogen bonds as conduits, “proton wires” of hydrogen-bonded networks that can connect and reconnect to alter molecular properties.

  physics research atomic discovery
  1 year ago reblog like 6 notes
• Looking at quantum gravity in a mirror →

  

  Einstein’s theory of gravity and quantum physics are expected to merge at the Planck-scale of extremely high energies and on very short distances. At this scale, new phenomena could arise. However, the Planck-scale is so remote from current experimental capabilities that tests of quantum gravity are widely believed to be nearly impossible. Now an international collaboration between the groups of Caslav Brukner and Markus Aspelmeyer at the University of Vienna and Myungshik Kim at Imperial College London has proposed a new quantum experiment using Planck-mass mirrors. Such an experiment could test certain predictions made by quantum gravity proposals in the laboratory. The findings will be published this week in Nature Physics.

  physics quantum research
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• Cold atoms simulate graphene →

  

  Physicists Andre Geim and Konstantin Novoselov from Manchester University were the first to isolate and identify graphene in 2004. Graphene is a single layer of carbon atoms, which form a two-dimensional honeycomb structure. This makes graphene an exceptionally good conductor, of great interest for future electronic devices.

  graphene atoms research future physics
  1 year ago reblog like 2 notes
• Researchers mimic relativity and the Higgs field in graphene-like material →

  

  The behavior of electrons and other particles depends on their environment. In particular, the interactions inside materials can alter the collective properties of the material’s electrons, producing what are effectively new “particles”—known as quasiparticles—with correspondingly new behaviors. The surfaces of solids are fertile ground for quasiparticles, since they are two-dimensional; as we’ve seen in a number of other experiments, the loss of the third dimension can lead to exciting new physics.

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• The Most Astounding Fact

  Astrophysicist Dr. Neil DeGrasse Tyson was asked in an interview with TIME magazine, “What is the most astounding fact you can share with us about the Universe?” This is his answer.

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  1 year ago reblog like 14 notes
• Scientists score new victory over quantum uncertainty →

  

  Most people attempt to reduce the little uncertainties of life by carrying umbrellas on cloudy days, purchasing automobile insurance or hiring inspectors to evaluate homes they might consider purchasing. For scientists, reducing uncertainty is a no less important goal, though in the weird realm of quantum physics, the term has a more specific meaning.

  quantum physics research
  1 year ago reblog like 10 notes
• Quantum physicists shed new light on relation between entanglement and nonlocality →

  New research from the University of Bristol may disprove a long-standing conjecture made by one of the founders of quantum information science: that quantum states featuring ‘positive partial transpose’, a particular symmetry under time-reversal, can never lead to nonlocality.

  physics research future
  1 year ago reblog like 36 notes
• Carbon membranes excel at separating liquids →

  

  Two independent teams have made ultrathin, cabon-based membranes with extraordinary properties that could be used in a range of applications, from water filtration to petroleum processing. One team, based at the University of Manchester in the UK, has made membrane from graphene oxided that appears to be highly permeable to water while being impermeable to all other liquids and gases. The other group, at Japan’s National Institute for Materials Science, has made membranes from diamond-like carbon (DLC) that are highly permeable to certain organic solvents, but not others.

  carbon physics research future
  1 year ago reblog like 93 notes
• String Theory is the Only Show in Town →

  Every Wednesday, Michio Kaku will be answering reader questions about physics and futuristic science. If you have a question for Dr. Kaku, just post it in the comments section below and check back on Wednesdays to see if he answers it.

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  1 year ago reblog like 12 notes
• Study supports role of quantum effects in photosynthesis →

  

  Until a few years ago, photosynthesis seemed to be a straightforward and well-understood process in which plants and other organisms use sunlight to convert carbon dioxide and water into sugars, with oxygen as a waste product. But recent research showing that the light energy entering these organisms’ light-absorbing chromophore molecules may exist in two places at once – as a quantum superposition – has raised a new question: what role, if any, do quantum effects play in the vastly important and widespread process of photosynthesis?

  quantum physics photosynthesis research
  1 year ago reblog like 13 notes