来源:Journal of Physics A-Mathematical and Theoretical, 2011, 44(6): 068001.
DOI:10.1088/1751-8113/44/6/068001
摘要
A long calculation on the basis of a general inequality by Gaveau and Schulman on decoherence energies is reduced to the application of few basic observations on product structures in a class of time evolutions of product states.