Thermal Bogoliubov transformation in nuclear structure theory

TL;DR

This paper discusses the application of the thermal Bogoliubov transformation within the thermo field dynamics framework to extend the Quasiparticle-Phonon Model for studying hot nuclei at finite temperatures, surpassing standard approximations.

Contribution

It introduces a novel extension of the Quasiparticle-Phonon Model using thermo field dynamics to analyze properties of hot nuclei beyond traditional approximations.

Findings

Extended QPM-TFD model enables analysis beyond thermal Hartree-Fock.

The approach allows for more accurate modeling of hot nuclear systems.

Provides a framework for future finite-temperature nuclear studies.

Abstract

Thermal Bogoliubov transformation is an essential ingredient of the thermo field dynamics -- the real time formalism in quantum field and many-body theories at finite temperatures developed by H. Umezawa and coworkers. The approach to study properties of hot nuclei which is based on the extension of the well-known Quasiparticle-Phonon Model to finite temperatures employing the TFD formalism is presented. A distinctive feature of the QPM-TFD combination is a possibility to go beyond the standard approximations like the thermal Hartree-Fock or the thermal RPA ones.