scholarly journals Quantum critical exponents for a disordered three-dimensional Weyl node

2015 ◽  
Vol 92 (11) ◽  
Author(s):  
Björn Sbierski ◽  
Emil J. Bergholtz ◽  
Piet W. Brouwer
Keyword(s):  
Critical Exponents ◽  
Three Dimensional ◽  
Quantum Critical

Non-Equilibrium Critical Relaxation of Heisenberg Ferromagnets with Long-Range Correlated Defects

2012 ◽  
Vol 190 ◽  
pp. 39-42
Author(s):  
M. Medvedeva ◽  
Pavel V. Prudnikov
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Critical Behavior ◽  
Critical Exponents ◽  
Heisenberg Model ◽  
Three Dimensional ◽  
Initial State ◽  
Short Time ◽  
Theoretic Description ◽  
Good Agreement

The dynamic critical behavior of the three-dimensional Heisenberg model with longrangecorrelated disorder was studied by using short-time Monte Carlo simulations at criticality.The static and dynamic critical exponents are determined. The simulation was performed fromordered initial state. The obtained values of the exponents are in a good agreement with resultsof the field-theoretic description of the critical behavior of this model in the two-loopapproximation.

scholarly journals HIGH-PRECISION ESTIMATES OF CRITICAL QUANTITIES BY MEANS OF IMPROVED HAMILTONIANS

2001 ◽  
Vol 16 (11) ◽  
pp. 2009-2014 ◽  
Author(s):  
MASSIMO CAMPOSTRINI ◽  
PAOLO ROSSI ◽  
ETTORE VICARI ◽  
MARTIN HASENBUSCH ◽  
ANDREA PELISSETTO
Keyword(s):  
Monte Carlo ◽  
High Temperature ◽  
Equation Of State ◽  
High Precision ◽  
Critical Exponents ◽  
Three Dimensional ◽  
Spin Models ◽  
Critical Equation ◽  
Universality Classes ◽  
Very High

Three-dimensional spin models of the Ising and XY universality classes are studied by a combination of high-temperature expansions and Monte Carlo simulations applied to improved Hamiltonians. The critical exponents and the critical equation of state are determined to very high precision.

scholarly journals Critical exponents for a three-dimensional O(n)-symmetric model withn>3

1995 ◽  
Vol 51 (3) ◽  
pp. 1894-1898 ◽  
Author(s):  
S. A. Antonenko ◽  
A. I. Sokolov
Keyword(s):  
Critical Exponents ◽  
Three Dimensional ◽  
Symmetric Model

Quantum Critical Phenomena in the Ni S2−xSex System

2000 ◽  
Vol 658 ◽  
Author(s):  
J.M. Honig
Keyword(s):  
Electrical Conductivity ◽  
Critical Point ◽  
Critical Phenomena ◽  
Critical Exponents ◽  
Moderate Pressure ◽  
Correlation Effects ◽  
Detailed Data ◽  
Quantum Critical Phenomena ◽  
Quantum Critical

ABSTRACTElectrical conductivity experiments on NiS2−xSex (x = 0.45) subjected to moderate pressure in the 30 – 800 mK range permit the investigation of quantum critical phenomena in this system. Detailed data are presented in the context of standard theories of correlation effects in the vicinity of a critical point. The critical exponents pertaining to these effects have been evaluated; the significance of these findings require further study.

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