Generalized thermo vacuum state derived by the partial trace method

TL;DR

This paper introduces a simplified method for deriving generalized thermo vacuum states using the IWOP technique, enhancing thermo field dynamics and broadening its applications.

Contribution

The paper presents a novel, more straightforward approach to deriving generalized thermo vacuum states via the IWOP method, improving upon previous Umezawa-Takahashi techniques.

Findings

Simpler derivation of generalized thermo vacuum states

Enhanced development of thermo field dynamics

Discussion of applications of the new states

Abstract

By virtue of the technique of integration within an ordered product (IWOP) of operators we present a new approach for deriving generalized thermo vacuum state which is simpler in form that the result by using the Umezawa-Takahashi approach, in this way the thermo field dynamics can be developed. Applications of the new state are discussed.