Coherence Conservation of a Qubit Coupled to a Thermal Dissipating Environment

TL;DR

This paper reviews and extends the quantum wipe effect, demonstrating that quantum coherence in a qubit is conserved when coupled to a fast dissipating environment at thermal equilibrium, with analytical proof provided.

Contribution

It extends the analytical proof of the quantum wipe effect to environments at thermal equilibrium, showing coherence conservation in such systems.

Findings

Quantum coherence is conserved with fast dissipating environments.

The analytical proof is extended to thermal equilibrium environments.

The quantum wipe effect is applicable beyond initial models.

Abstract

It is shown that quantum coherence is conserved in a principal system in the case that the system is coupled to a fast dissipating environment [arXiv:0709.0562]. The phenomenon is called the quantum wipe effect. Here, this effect is reviewed and the analytical proof for a model system consisting of a one-qubit system coupled to a fast dissipating environment is extended to an environment at a thermal equilibrium.