Parametric down conversion of a bosonic thermofield vacuum

TL;DR

This paper investigates the process of parametric down conversion starting from a bosonic thermofield vacuum, analyzing the evolution of quantum states using thermofield dynamics and Liouville-von Neumann equations.

Contribution

It introduces a novel approach to model parametric down conversion with thermofield vacua using thermofield dynamics and quantum evolution equations.

Findings

Generation of two excited photons from a bosonic thermofield vacuum

Application of thermofield dynamics to nonlinear quantum optical processes

Evolution of quantum states under Liouville-von Neumann equation

Abstract

We consider a process of parametric down conversion where the input state is a bosonic thermofield vacuum. This state leads to a parametric down conversion, generating an output of two excited photons. Following a thermofield dynamics scheme, the input state, initially in a bosonic thermofield vacuum, and the output states, initially in vacuum states, evolve under a Liouville-von Neumann equation.