# Bringing Schrodinger's Cat to Life with Non-Equilibrium Respiration

## TL;DR

This paper introduces a non-equilibrium method using a Mach-Zehnder interferometer and Kerr medium to generate and sustain Schrödinger cat states, demonstrating environmental influences can enhance quantum coherence at high temperatures.

## Contribution

It presents a novel approach to creating and maintaining macroscopic quantum superpositions under non-equilibrium conditions without Markov assumptions.

## Key findings

- Non-equilibrium environments can revive quantum beats longer.
- Environmental temperature and spectral density shape oscillation patterns.
- Quantum features show robustness against environmental effects at high temperatures.

## Abstract

In this study, we have proposed a method based on non-equilibrium effects to generate the superposition of macroscopically distinguishable quantum states, known as Schrodinger cat states, by using a Mach-Zehnder interferometry type experiment. Interaction of the input number state with a Kerr medium in the presence of a couple of heat baths in different temperatures in interaction picture and without imposing Markov assumption is considered. We have shown that the study of dynamics of the cat states under non-equilibrium condition open a way for the robustness of quantum features against the destructive role of the environment even at high temperature limit. It is verified that mutual influence of the environments, far from equilibrium, on the open system, makes it possible to revive quantum beats for longer time intervals. Moreover, we have probed how the traits of the environment, like its temperature and the Ohmic, super-Ohmic or sub-Ohmic functionality of the spectral density, may affect the pattern of the oscillation between alive or dead states of the cat.