scholarly journals Real time correlations at finite temperature for the ising model.

1999 ◽  
Vol 73 (1-3) ◽  
pp. 778-780 ◽  
Author(s):  
E. Mendel
Keyword(s):  
Ising Model ◽  
Real Time ◽  
Finite Temperature ◽  
Time Correlations

SHORT TIME CORRELATIONS IN A TWO-DIMENSIONAL ISING MODEL WITH A LINE OF DEFECTS

2001 ◽  
Vol 15 (25) ◽  
pp. 1141-1146 ◽  
Author(s):  
T. TOMÉ ◽  
C. S. SIMÕES ◽  
J. R. DRUGOWICH DE FELÍCIO
Keyword(s):  
Monte Carlo ◽  
Critical Temperature ◽  
Ising Model ◽  
Early Time ◽  
Time Correlation ◽  
Two Dimensional ◽  
Time Dynamics ◽  
Time Correlations ◽  
Time Regime ◽  
Short Time

We study the short time dynamics of a two-dimensional Ising model with a line of defects. The dynamical critical exponent θ associated to the early time regime at the critical temperature was obtained by Monte Carlo simulations. The exponent θ was estimated by a method where the quantity of interest is the time correlation of the magnetization.

FRAGMENTATION FUNCTION IN THERMOFIELD DYNAMICS

2013 ◽  
Vol 28 (10) ◽  
pp. 1350032 ◽  
Author(s):  
M. LADREM ◽  
M. CHEKERKER ◽  
F. C. KHANNA ◽  
A. E. SANTANA
Keyword(s):  
Temperature Effect ◽  
Real Time ◽  
Finite Temperature ◽  
Fragmentation Function ◽  
Wilson Loop ◽  
High Energy ◽  
Quantum Field ◽  
Field Formalism ◽  
Definition Of

The fragmentation function at high energy experiments is introduced by using thermofield dynamics (TFD), a real-time finite-temperature quantum field formalism. Due to the structure of TFD, the results at T = 0 and T ≠ 0 are split in a direct way. As an application, we consider the temperature effect on the fragmentation function of a hadron leading to quark–antiquark pairs. Using a definition of Wilson-loop in real-time, we find that the fragmentation function decreases in magnitude with an increase in the temperature.

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