An Algebraic Proof of Thermal Wick's Theorem
Statistical Mechanics
2025-01-08 v1
Abstract
Every many-body state can be constructed from the vacuum state by iteratively applying the creation operators, therefore the thermal expectation can be transformed into a sum of vacuum expectation where the vacuum Wick's theorem holds. Based on this observation this article gives an algebraic proof of thermal Wick's theorem.
Cite
@article{arxiv.2501.03665,
title = {An Algebraic Proof of Thermal Wick's Theorem},
author = {Ruofan Chen},
journal= {arXiv preprint arXiv:2501.03665},
year = {2025}
}