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Quantum computers

  1. Jun 22, 2004 #1
    Hi everyone.
    I just wanted to start a new Thread on this interesting field of physics.
    I'll be glad to here your opinions, news and ... on this area.
    Thanks alot :wink:
     
  2. jcsd
  3. Jun 22, 2004 #2
    in short....

    good by RSA
     
  4. Jun 23, 2004 #3
    Well, it'll surely be a breakthrough if finally made.
     
  5. Jun 23, 2004 #4
    AWhere is the top QC research being done in academia?
     
  6. Jun 23, 2004 #5
    It's interesting to have a certain knowledge about quantum gates, for example:
    -Quantum NOT gate
    -Z gate
    -Hadamard gate
    -C-NOT gate
    -f-gate (function gate)
     
  7. Jun 24, 2004 #6
    You might be also be interested in libquantum, a C library for the simulation of a quantum computer. It's for free:
    http://www.enyo.de/libquantum/
     
  8. Jun 24, 2004 #7
    It depends what you mean. Are you interested in experiment or theory? Also, does it strictly have to be computing, or are you interested in the broader framework of quantum information theory? Assuming the latter, here are some more theoretical groups:

    CANADA

    Waterloo (University and Perimeter Institute)
    Calgary (Cleve group)
    Montreal (Groups of Brassard and Crepeau)

    USA

    Caltech (Preskill group)
    IBM (Yorktown - Bennett group)
    Berkley (Vazirani group)
    Los Alamos
    New Mexico (Caves and Deutsch groups)
    MIT (Lloyd, Chuang, Shor groups)

    Australia

    Brisbane (Nielsen group)

    UK

    Cambridge (Ekert group)
    Bristol (Jozsa, Popescu, Linden, Winter, Rarity)
    Oxford (Much smaller group now, but was one of the leading groups in the early days)

    Rest of Europe

    Gdansk (Horodecki group)
    Vienna (Zeilinger group)
    Munich (Max Planck institute - Cirac group)
    Amsterdam (CWI - Burhman group)
    Braunsweig (Werner group)

    This is only a partial list, concentrating on large or "famous" groups, focussed on theory rather than experiment. Some of the leading lights of the field are rather isolated in colleges where only one or two people work on the subject (Schumacher and Wooters for example). Finally, the field is growing at a rapid rate, so it is probably easier to ask which universities are not studying quantum computing rather than the other way around.
     
  9. Jun 24, 2004 #8
    thanks a lot
     
  10. Jun 24, 2004 #9
    This paper is of April 2004 and talks of something I've never heard before, Surface acoustic wave quantum computers
    http://arxiv.org/abs/cond-mat/0406167
    Single-qubit gates and measurements in the surface acoustic wave quantum computer
    Authors: S. Furuta, C. H. W. Barnes, C. J. L. Doran
    Comments: 13 pages, 10 figures, submitted to Phys. Rev. B
    Subj-class: Mesoscopic Systems and Quantum Hall Effect

    In the surface acoustic wave quantum computer, the spin state of an electron trapped in a moving quantum dot comprises the physical qubit of the scheme. Via detailed analytic and numerical modeling of the qubit dynamics, we discuss the effect of excitations into higher-energy orbital states of the quantum dot that occur when the qubits pass through magnetic fields. We describe how single-qubit quantum operations, such as single-qubit rotations and single-qubit measurements, can be performed using only localized static magnetic fields. The models provide useful parameter regimes to be explored experimentally when the requirements on semiconductor gate fabrication and the nanomagnetics technology are met in the future.
     
  11. Jun 26, 2004 #10
    Dear meteor;
    thanks for the useful links.
    somy
     
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