Relaxation Control of Open Quantum Systems

TL;DR

This paper presents a method to control relaxation timescales in open quantum systems, enabling steady-state convergence within experimental times by constructing specific unitary operations to cancel relaxation modes.

Contribution

It introduces a general recipe for state preparation that actively manages relaxation dynamics in open quantum systems, considering practical experimental constraints.

Findings

Successfully designed a unitary operation to cancel relaxation modes

Demonstrated the approach in a long-range qubit chain system

Achieved steady-state convergence within realistic experimental times

Abstract

A fundamental problem in experiments with open quantum systems is to ensure steady-state convergence within a given operational time window. Here, we devise a general state preparation recipe to control relaxation timescales and achieve steady-state convergence within experimental run times. We do so by constructing a unitary operation that cancels the desired relaxation modes. We provide an example in a few-body interacting system (long-range qubit chain), taking into account limitations of experimentally accessible unitary operations in quantum simulators.