Controllable dynamics of a dissipative two-level system

TL;DR

This paper presents a method to control and suppress decoherence in a two-level quantum system interacting with an environment by introducing an auxiliary degree of freedom, enabling more manageable quantum dynamics.

Contribution

It introduces a novel strategy to modulate decoherence in a dissipative two-level system using an assisted degree of freedom, offering an alternative to traditional decoherence mitigation techniques.

Findings

Decay rate can be significantly suppressed with proper control.

The approach provides a new way to manage dissipative quantum systems.

Controllable dynamics can be achieved through auxiliary degrees of freedom.

Abstract

We propose a strategy to modulate the decoherence dynamics of a two-level system, which interacts with a dissipative bosonic environment, by introducing an assisted degree of freedom. It is revealed that the decay rate of the two-level system can be significantly suppressed under suitable steers of the assisted degree of freedom. Our result provides an alternative way to fight against decoherence and realize a controllable dissipative dynamics.