62,134 research outputs found

    More on general pp-brane solutions

    Full text link
    Recently it was found that the complete integration of the Einstein-dilaton-antisymmetric form equations depending on one variable and describing static singly charged pp-branes leads to two and only two classes of solutions: the standard asymptotically flat black pp-brane and the asymptotically non-flat pp-brane approaching the linear dilaton background at spatial infinity. Here we analyze this issue in more details and generalize the corresponding uniqueness argument to the case of partially delocalized branes. We also consider the special case of codimension one and find, in addition to the standard domain wall, the black wall solution. Explicit relations between our solutions and some recently found pp-brane solutions ``with extra parameters'' are presented.Comment: 29 pages, 2 figure

    Nuclear Magnetic Resonance Implementation of a Quantum Clock Synchronization Algorithm

    Full text link
    The quantum clock synchronization algorithm proposed by I. L. Chuang (Phys. Rev. Lett, 85, 2006(2000)) has been implemented in a three qubit nuclear magnetic resonance quantum system. The effective-pure state is prepared by the spatial averaging approach. The time difference between two separated clocks can be determined by reading out directly through the NMR spectra.Comment: 13 pages, 5 figure
    • …
    corecore