Search Results - subject:"Ising Model"

Zero-temperature dynamics for the ferromagnetic Ising model on random graphs

Häggström, Olle - In: Physica A: Statistical Mechanics and its Applications 310 (2002) 3, pp. 275-284

We consider Glauber dynamics at zero temperature for the ferromagnetic Ising model on the usual random graph model on N …

Persistent link: https://www.econbiz.de/10011058887

Detailed structure of configuration space and its importance on ergodic separation of ±J Ising lattices

Vogel, E.E; Ramirez-Pastor, A.J; Nieto, F - In: Physica A: Statistical Mechanics and its Applications 310 (2002) 3, pp. 384-396

A complete and exact characterization of the configuration space of 2-D ±J Ising lattices is performed. A new algorithm is introduced here representing advantages for reaching all states for small samples and doing a non-biased sampling of ground states for larger samples. We report efficient...

Persistent link: https://www.econbiz.de/10011062760

Ensemble equivalence for non-extensive thermostatistics

Toral, Raúl; Salazar, Rafael - In: Physica A: Statistical Mechanics and its Applications 305 (2002) 1, pp. 52-57

We compute the internal energy of different Ising-type models, both long and short range, under Tsallis statistics using the microcanonical and the canonical ensemble and we discuss under which conditions both ensembles give equivalent results.

Persistent link: https://www.econbiz.de/10011062863

Generalized Pseudo-Likelihood Estimates for Markov Random Fields on Lattice

Huang, Fuchun; Ogata, Yosihiko - In: Annals of the Institute of Statistical Mathematics 54 (2002) 1, pp. 1-18

Persistent link: https://www.econbiz.de/10005760237

Distribution functions in Ising patches: a test case for protein denaturation

Poland, Douglas - In: Physica A: Statistical Mechanics and its Applications 309 (2002) 1, pp. 45-68

-entropy method using a finite set of moments. For this purpose we pick the two-dimensional Ising model near the critical point … in density and enthalpy in the neighborhood of the critical point. The distribution functions for the Ising model are in … fact very similar to those for proteins. For the Ising model, we can then compare the exact distribution functions with …

Persistent link: https://www.econbiz.de/10010588413

Stability of money: phase transitions in an Ising economy

Bornholdt, Stefan; Wagner, Friedrich - In: Physica A: Statistical Mechanics and its Applications 316 (2002) 1, pp. 453-468

The stability of money value is an important requisite for a functioning economy, yet it critically depends on the actions of participants in the market themselves. Here we model the value of money as a dynamical variable that results from trading between agents. The basic trading scenario can...

Persistent link: https://www.econbiz.de/10010588747

Multiscaling in Ising quantum chains with random Hilhorst–van Leeuwen perturbations

Turban, L. - In: Physica A: Statistical Mechanics and its Applications 303 (2002) 3, pp. 275-285

We consider the influence on the surface critical behaviour of a quantum Ising chain of quenched random surface perturbations decaying as a power of the distance from the surface (random Hilhorst–van Leeuwen models). We study, analytically and numerically, the multiscaling behaviour of the...

Persistent link: https://www.econbiz.de/10010589834

Wetting of a corrugated surface 3D Ising model

Bahmad, L.; Benyoussef, A.; Ez-Zahraouy, H. - In: Physica A: Statistical Mechanics and its Applications 303 (2002) 3, pp. 525-533

The wetting of a corrugated surface, 3D spin-12 Ising model, in the presence of longitudinal and uniform surface fields …

Persistent link: https://www.econbiz.de/10010590182

S=1 kagomé Ising model with triquadratic interactions, single-ion anisotropy and magnetic field: exact phase diagrams

Barry, J.H.; Muttalib, K.A. - In: Physica A: Statistical Mechanics and its Applications 311 (2002) 3, pp. 507-526

We consider a S=1 kagomé Ising model with triquadratic interactions around each triangular face of the kagomé lattice … provides the corresponding exact phase diagrams of the three-parameter S=1 Ising model. As anisotropy competes with …

Persistent link: https://www.econbiz.de/10010591325

Clustering and signalling of cell receptors

Shi, Yu - In: Physica A: Statistical Mechanics and its Applications 311 (2002) 1, pp. 199-212

statistical average quantities. This model reduces to a floating Ising model with a random field. We calculate the signalling in a …

Persistent link: https://www.econbiz.de/10010591582