Identities and Many-Body Approaches in Bose-Einstein Condensates
Quantum Gases
2019-08-30 v2
Abstract
This paper discusses exact relations in Bose--Einstein condensates (BECs), starting from basic properties of an ideal Bose gas. In particular, focused on are the Hugenholtz--Pines relation, Nepomnyashchii--Nepomnyashchii identity, and identities for the density response function. After introducing these exact relations, a few approaches of many-body approximations are discussed, which satisfy the exact relations in BECs. This paper will serve as a bridge between theories on exact relations and those on approximations in BECs.
Keywords
Cite
@article{arxiv.1903.03284,
title = {Identities and Many-Body Approaches in Bose-Einstein Condensates},
author = {Shohei Watabe},
journal= {arXiv preprint arXiv:1903.03284},
year = {2019}
}
Comments
10 pages