Quantum Coherence Conservation by Growth in Environmental Dissipation Rate

TL;DR

This paper demonstrates that increasing the dissipation rate of an environment can preserve quantum coherence in a system, offering a novel approach distinct from traditional noise suppression methods.

Contribution

It introduces a new mechanism for quantum coherence conservation through high environmental dissipation, supported by analytical and numerical models.

Findings

High environmental dissipation preserves quantum coherence.

Analytical solution for a single qubit coupled to a dissipating environment.

Numerical examples show coherence conservation in spin-boson models.

Abstract

Quantum coherence conservation is shown to be achieved by a very high rate of dissipation of an environmental system coupled with a principal system. This effect is not in the list of previously-known strategies of noise suppression, such as Zeno effect, dynamical decoupling, quantum error correction code, and decoherence free subspace. An analytical solution is found for a simplified model of a single qubit coupled with an environmental single qubit dissipating rapidly. We also show examples of coherence conservation in a spin-boson linear coupling model with a numerical evaluation.