Coherent dynamics of a photon-dressed qubit

TL;DR

This paper investigates the dynamics of a photon-dressed transmon qubit near a mirror, revealing how probe and dressing signals influence its behavior and enabling insights into quantum transitions like Landau-Zener-Stuckelberg-Majorana.

Contribution

It provides a detailed analysis of the coherent dynamics of a photon-dressed qubit using the Bloch equation framework, linking theoretical predictions with measurable reflection signals.

Findings

Time-dependent occupation probabilities match experimental reflection data.

System dynamics can be controlled via probe and dressing signals.

Insights into Landau-Zener-Stuckelberg-Majorana transitions are gained.

Abstract

We consider the dynamics and stationary regime of a capacitively-shunted transmon-type qubit in front of a mirror, affected by two signals: probe and dressing signals. By varying the parameters of these signals and then analyzing the probe signal (reflected by the atom-mirror system), it is possible to explore the system dynamics, which can be described by the Bloch equation. The obtained time-dependent occupation probabilities are related to the experimentally measured reflection coefficient. The study of this type of dynamics opens up new horizons for better understanding of the system properties and underlying physical processes, such as Landau-Zener-Stuckelberg-Majorana transitions.