A Physical Explanation for Tilde System in Thermo Field Dynamics
Quantum Physics
2011-08-04 v2
Abstract
For a two-body quantum system, any pure state can be represented by a biorthogonal expression by means of Schmidt decomposition. Using this in the composite system which include a thermodynamic system and its surroundings, it is found that the tilde system in thermo field dynamics is just the surroundings of the real system.
Keywords
Cite
@article{arxiv.quant-ph/0102127,
title = {A Physical Explanation for Tilde System in Thermo Field Dynamics},
author = {Dong Mi and He-Shan Song and Ying An},
journal= {arXiv preprint arXiv:quant-ph/0102127},
year = {2011}
}
Comments
10 pages. To be published in Modern Physics Letter A