Condensed Matter Theory

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BPS and non-BPS states in a supersymmetric Landau-Ginzburg theory

Journal of High Energy Physics Springer Nature 2003:01 (2003) 053

Authors:

Alin Tirziu, Paul Fendley
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Coexistence of Composite-Bosons and Composite-Fermions in nu=1/2 + 1/2 Quantum Hall Bilayers

(2003)

Authors:

Steven H Simon, EH Rezayi, Milica Milovanovic
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Monte Carlo evaluation of non-abelian statistics

Physical Review Letters 90:1 (2003)

Authors:

Y Tserkovnyak, SH Simon

Abstract:

A numerical method was formulated to study braiding statistics of FQH excitations. The method was applied to perform the first direct calculation of the non-Abelian statistics in the MR state. Results confirm previous data drawn within the CFT framework.
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A model to calculate the capacity distribution of correlated MIMO channels and interferers

Institute of Electrical and Electronics Engineers (IEEE) 4 (2003) 1791-1796

Authors:

Aris L Moustakas, Steven H Simon, Anirvan M Sengupta
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Capacity of a Gaussian MIMO channel with nonzero mean

IEEE Vehicular Technology Conference 58:3 (2003) 1767-1771

Authors:

S Venkatesan, SH Simon, RA Valenzuela

Abstract:

We characterize the input covariance that maximizes the ergodic capacity of a flat-fading, multiple-input-multiple-output (MIMO) channel with additive white Gaussian noise, when the entries of the channel matrix are independent, circularly symmetric, complex Gaussian random variables of nonzero (and possibly different) means and identical variances. We show that the optimal transmit covariance must have the same eigenvectors as the squared mean channel, thereby reducing the computation of the optimal covariance to a simple convex optimization. This generalizes existing results for multiple-input-single-output (MISO) channels and MIMO channels restricted to have a mean of unit rank.
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