Low temperature relaxational dynamics of the Ising chain in a transverse field

Details Low temperature relaxational dynamics of the Ising chain in a transverse field Low temperature relaxational dynamics of the Ising chain in a transverse field

1996-09-19

arxiv.org/abs/cond-mat/9609185v2

Physical Review Letters, 78, 2220 (1997)

Physics

Condensed Matter

Final version to be published in Physical Review Letters. The postscript file is also available by anonymous ftp at ftp://ch

Scientific paper

10.1103/PhysRevLett.78.2220

We present asymptotically exact results for the real time order parameter correlations of a class of d=1 Ising models in a transverse field at low temperatures (T) on both sides of the quantum critical point. The correlations are a product of a T-independent factor determined by quantum effects, and a T-dependent relaxation function which comes from a classical theory. We confirm our predictions by a no-free-parameter comparison with numerical studies on the nearest neighbor spin-1/2 model.

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