Zobrazeno 1 - 10
of 629
pro vyhledávání: '"Sherrington, D"'
Publikováno v:
Phys. Rev. B 81, 014406 (2010)
We study the effect in geometrically frustrated antiferromagnets of weak, random variations in the strength of exchange interactions. Without disorder the simplest classical models for these systems have macroscopically degenerate ground states, and
Externí odkaz:
http://arxiv.org/abs/0909.5069
Ergodic stationary states of Minority Games with S strategies per agent can be characterised in terms of the asymptotic probabilities $\phi_a$ with which an agent uses $a$ of his strategies. We propose here a simple and general method to calculate th
Externí odkaz:
http://arxiv.org/abs/physics/0611188
Autor:
Mancini, F. P., Sherrington, D.
Publikováno v:
J. Phys. A: Math. Gen. 39 13393 (2006)
We consider the quadrupolar glass model with infinite-range random interaction. Introducing a simple one-step replica symmetry breaking ansatz we investigate the para-glass continuous (discontinuous) transition which occurs below (above) a critical v
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607107
Autor:
Oppermann, R., Sherrington, D.
Using numerical self-consistent solutions of a sequence of finite replica symmetry breakings (RSB) and Wilson's renormalization group but with the number of RSB-steps playing a role of decimation scales, we report evidence for a non-trivial T->0-limi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509700
Publikováno v:
J. Phys. A: Math. Gen. 36 (2003) 11159-11172
We present an exact dynamical solution of a spherical version of the batch minority game (MG) with random external information. The control parameters in this model are the ratio of the number of possible values for the public information over the nu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0303615
Autor:
Oppermann, R., Sherrington, D.
Models with range-free frustrated Ising spin- and Hubbard interaction are treated exactly by means of the discrete time slicing method. Critical and tricritical points, correlations, and the fermion propagator, are derived as a function of temperatur
Externí odkaz:
http://arxiv.org/abs/cond-mat/0207734
We study a simple solvable model describing the genesis of monomer sequences for hetero-polymers (such as proteins), as the result of the equilibration of a slow stochastic genetic selection process which is assumed to be driven by the competing dema
Externí odkaz:
http://arxiv.org/abs/cond-mat/0206277
We study the dynamics of a version of the batch minority game, with random external information and with different types of inhomogeneous decision noise (additive and multiplicative), using generating functional techniques \`{a} la De Dominicis. The
Externí odkaz:
http://arxiv.org/abs/cond-mat/0106635
We define modulated replica symmetry breaking (RSB)-schemes which combine tree- and wave-like structures. A modulated scheme and unmodulated RSB are applied at 1-step level to a semiconductor model with antiferromagnetic Korenblit-Shender interaction
Externí odkaz:
http://arxiv.org/abs/cond-mat/0106066
Publikováno v:
Quantitative Finance 1, 246 (2001)
We discuss recent work in the study of a simple model for the collective behaviour of diverse speculative agents in an idealized stockmarket, considered from the perspective of the statistical physics of many-body systems. The only information about
Externí odkaz:
http://arxiv.org/abs/cond-mat/0012269