Master Equation Emulation and Coherence Preservation with Classical Control of a Superconducting Qubit

TL;DR

This paper presents a method to emulate open quantum system dynamics using classical noise and shows how non-Markovian noise can enhance qubit coherence, aiding the testing of open system theories.

Contribution

It introduces a systematic approach to engineer system-environment interactions and emulate master equations with classical noise, including non-Markovian effects.

Findings

Classical noise can successfully emulate specific master equation dynamics.

Non-Markovian noise can extend quantum coherence.

The method provides a new experimental tool for open quantum systems.

Abstract

Open quantum systems are a topic of intense theoretical research. The use of master equations to model a system's evolution subject to an interaction with an external environment is one of the most successful theoretical paradigms. General experimental tools to study different open system realizations have been limited, and so it is highly desirable to develop experimental tools which emulate diverse master equation dynamics and give a way to test open systems theories. In this paper we demonstrate a systematic method for engineering specific system-environment interactions and emulating master equations of a particular form using classical stochastic noise. We also demonstrate that non-Markovian noise can be used as a resource to extend the coherence of a quantum system and counteract the adversarial effects of Markovian environments.