Nanoscale dislocation shear loops at static equilibrium and finite temperature

Equilibrium shape of dislocation shear loops in anisotropic -Fe

We present dislocation dynamics (DD) simulations of shear loops in a highly anisotropic linear elastic crystal. The equilibrium shapes of the loops are determined for the four principal slip systems of the body-centered-cubic lattice, using empirical elastic constants for α-Fe, for a range of temperatures over which its elastic anisotropy varies considerably. The results are compared with those...

Spacelike Wilson Loops at Finite Temperature

In the high temperature phase of Yang-Mills theories, large spatial Wilson loops show area law behaviour with a string tension that grows with increasing temperature. Within the framework of the commonly used string picture we use a large scale expansion, which allows us to determine the string tension from measurements of intermediate and symmetric Wilson loops. BI-TP 93/12; April 1993 1 Physi...

Finite-temperature dislocation interactions

Non-static Dimensional Reduction of QED3 at Finite Temperature

We study an extreme non-static limit of 2+1-dimensional QED obtained by making a dimensional reduction so that all fields are spatially uniform but time dependent. This dimensional reduction leads to a 0+1-dimensional field theory that inherits many of the features of the 2+1-dimensional model, such as Chern-Simons terms, time-reversal violation, an analogue of parity violation, and global U(2)...

A variational approach to coarse graining of equilibrium and non-equilibrium atomistic description at finite temperature

The aim of this paper is the development of equilibrium and non-equilibrium extensions of the quasicontinuum (QC) method. We first use variational mean-field theory and the maximum-entropy (max-ent) formalism for deriving approximate probability distribution and partition functions for the system. The resulting probability distribution depends locally on atomic temperatures defined for every at...