Extracavity quantum vacuum radiation from a single qubit

TL;DR

This paper develops a theoretical model predicting extracavity quantum vacuum radiation generated by rapid modulation of a single qubit-cavity system, highlighting unique spectral features and potential experimental observability.

Contribution

It introduces a generalized master equation including non-Markovian effects to describe vacuum radiation in strongly coupled qubit-cavity systems with anti-rotating wave terms.

Findings

Predicted significant extracavity quantum vacuum radiation output.

Identified peculiar spectral properties of the radiation.

Applicable to state-of-the-art circuit QED systems.

Abstract

We present a theory of the quantum vacuum radiation that is generated by a fast modulation of the vacuum Rabi frequency of a single two-level system strongly coupled to a single cavity mode. The dissipative dynamics of the Jaynes-Cummings model in the presence of anti-rotating wave terms is described by a generalized master equation including non-Markovian terms. Peculiar spectral properties and significant extracavity quantum vacuum radiation output are predicted for state-of-the-art circuit cavity quantum electrodynamics systems with superconducting qubits.