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arXiv.org e-Print Archive
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  • Description of the free motion with momentums in Godel's universe

    Barany, Balazs; Andai, Attila (2008)
    We study the geodesic motion in Godel's universe, using conserved quantities. We give a necessary and sufficient condition for curves to be geodesic curves in terms of conserved quantities, which can be computed from the initial values of the curve. We check our result with numerical simulations too.

    Crystalline color superconductors

    Anglani, Roberto; Casalbuoni, Roberto; Ciminale, Marco; Gatto, Raoul; Ippolito, Nicola; Mannarelli, Massimo; Ruggieri, Marco (2013)
    Inhomogeneous superconductors and inhomogeneous superfluids appear in a variety of contexts including quark matter at extreme densities, fermionic systems of cold atoms, type-II cuprates, and organic superconductors. In the present review the focus is on properties of quark matter at high baryonic density, which may exist in the interior of compact stars. The conditions realized in these stellar objects tend to disfavor standard symmetric BCS pairing and may favor an inhomogeneous color super...

    Second N=1 Superanalog of Complex Structure

    Duplij, Steven (1995)
    We found another N=1 odd superanalog of complex structure (the even one is widely used in the theory of super Riemann surfaces). New N=1 superconformal-like transformations are similar to anti-holomorphic ones of nonsupersymmetric complex function theory. They are dual to the ordinary superconformal transformations subject to the Berezinian addition formula presented, noninvertible, highly degenerated and twist parity of the tangent space in the standard basis. They also lead to the ''mixed c...

    Selective Uplink Training for Massive MIMO Systems

    Li, Changming; Zhang, Jun; Song, Shenghui; Letaief, K. B. (2016)
    As a promising technique to meet the drastically growing demand for both high throughput and uniform coverage in the fifth generation (5G) wireless networks, massive multiple-input multiple-output (MIMO) systems have attracted significant attention in recent years. However, in massive MIMO systems, as the density of mobile users (MUs) increases, conventional uplink training methods will incur prohibitively high training overhead, which is proportional to the number of MUs. In this paper, we p...

    Group-theoretical construction of extended baryon operators in lattice QCD

    Basak, S.; Edwards, R. G.; Fleming, G. T.; Heller, U. M.; Morningstar, C.; Richards, D.; Sato, I.; Wallace, S. (2005)
    Projects: NSF | Lattice QCD studies of the spectrum and structure of hadron excitations (0354982), NSF | Lattice Field Theory and Hadronic Physics (0300065)
    The design and implementation of large sets of spatially-extended, gauge-invariant operators for use in determining the spectrum of baryons in lattice QCD computations are described. Group-theoretical projections onto the irreducible representations of the symmetry group of a cubic spatial lattice are used in all isospin channels. The operators are constructed to maximize overlaps with the low-lying states of interest, while minimizing the number of sources needed in computing the required qu...
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