Gaussian Decoherence from Random Spin Environments

Preprint

28 December 2003

preprint
Published by arXiv in arXiv

Abstract

We examine an exactly solvable model of decoherence -- a spin-system interacting with a collection of environment spins. We show that in this model (introduced some time ago to illustrate environment--induced superselection) generic assumptions about the coupling strengths lead to a universal (Gaussian) suppresion of coherence between pointer states. We discuss the relation of our results to the spectral features of the environment, and comment on the observation of such time dependence in spin echo experiments.

Keywords

GAUSSIAN DECOHERENCE
SPIN ENVIRONMENTS
ECHO EXPERIMENTS
EXACTLY SOLVABLE
SOLVABLE MODEL
RANDOM SPIN

All Related Versions

Version 1, 2003-12-28, ArXiv
Version 2, 2004-02-10, ArXiv
Published version: Physical Review A, 72 (5), 052113.

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