Free-energy barriers in the Sherrington-Kirkpatrick modelE. Bittner and W. Janke
Institut für Theoretische Physik and Centre for Theoretical Sciences (NTZ) Universität Leipzig - Augustusplatz 10/11, D-04109 Leipzig, Germany
received 20 January 2005; accepted in final form 27 February 2006
published online 24 March 2006
The Sherrington-Kirkpatrick spin-glass model is investigated by means of Monte Carlo simulations by employing a combination of the multi-overlap algorithm with parallel tempering methods. We investigate the finite-size scaling behaviour of the free-energy barriers which are visible in the probability density of the Parisi overlap parameter. Assuming that the mean barrier height diverges with the number of spins N as , our data show good agreement with the theoretical value .
02.70.Uu - Applications of Monte Carlo methods.
75.10.Nr - Spin-glass and other random models.
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