2006

Transfer Matrices and Partition-Function Zeros for Antiferromagnetic Potts Models. IV. Chromatic polynomial with cyclic boundary conditions

Jesper Lykke Jacobsen, Jesus Salas 1 Journal of Statistical Physics 122 (2006) 705-760 We study the chromatic polynomial P_G(q) for m \times n square- and triangular-lattice strips of widths 2\leq m \leq 8 with cyclic boundary conditions. This polynomial gives the zero-temperature limit of the partition function for the antiferromagnetic q-state Potts model defined on the lattice G. […]

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Threshold values of Random K-SAT from the cavity method

Stephan Mertens 1, Marc Mezard 2, Riccardo Zecchina 3 Random Structures and Algorithms 28 (2006) 340-373 Using the cavity equations of \cite{mezard:parisi:zecchina:02,mezard:zecchina:02}, we derive the various threshold values for the number of clauses per variable of the random $K$-satisfiability problem, generalizing the previous results to $K \ge 4$. We also give an analytic solution of the equations, and some closed expressions

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The Statistics of the Number of Minima in a Random Energy Landscape

Satya N. Majumdar 1, Olivier C. Martin 1 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 74 (2006) 061112 We consider random energy landscapes constructed from d-dimensional lattices or trees. The distribution of the number of local minima in such landscapes follows a large deviation principle and we derive the associated law exactly for dimension 1. Also of

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The rich behavior of the Boltzmann equation for dissipative gases

M. H. Ernst, E. Trizac 1, A. Barrat 2 Europhysics Letters (EPL) 76 (2006) 56 Within the framework of the homogeneous non-linear Boltzmann equation, we present a new analytic method, without the intrinsic limitations of existing methods, for obtaining asymptotic solutions. This method permits extension of existing results for Maxwell molecules and hard spheres to large classes of particle interactions,

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The Glass-like Structure of Globular Proteins and the Boson Peak

Stefano Ciliberti 1, Paolo De Los Rios 2, Francesco Piazza 2 Physical Review Letters 96 (2006) 198103 Vibrational spectra of proteins and topologically disordered solids display a common anomaly at low frequencies, known as Boson peak. We show that such feature in globular proteins can be deciphered in terms of an energy landscape picture, as it is for glassy systems. Exploiting

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The Boltzmann equation for driven systems of inelastic soft spheres

M. H. Ernst, E. Trizac 1, A. Barrat 2 Journal of Statistical Physics 124 (2006) 549 We study a generic class of inelastic soft sphere models with a binary collision rate $g^\nu$ that depends on the relative velocity $g$. This includes previously studied inelastic hard spheres ($\nu=1$) and inelastic Maxwell molecules ($\nu=0$). We develop a new asymptotic method for analyzing

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