Sinusoidally Modulated Vacuum Rabi Oscillation of a Two-Level Atom in an Optomechanical Cavity

TL;DR

This paper investigates how a two-level atom's vacuum Rabi oscillation in an optomechanical cavity is sinusoidally modulated by light-mechanics coupling, supported by analytic modeling and numerical simulations.

Contribution

It introduces an analytic model explaining sinusoidally modulated Rabi oscillations in an optomechanical system, validated by numerical simulations and robustness analysis.

Findings

Sinusoidal modulation of Rabi oscillations observed at resonance

Analytic model successfully explains the modulation phenomenon

Modulated Rabi oscillations persist despite dissipation

Abstract

We study the coherent dynamics of an excited two-level atom in a vacuum optomechanical cavity and find that the original atom-cavity Rabi oscillation is sinusoidally modulated by the light-mechanics coupling as the Rabi splitting is on resonance with the mechanical mode. We develop an analytic model in a three-dimensional Hilbert subspace to explain this phenomenon and employ numerical simulations of the density-matrix master equation to confirm our analysis. We also show that the modulated Rabi oscillation survives in presence of dissipations and other non-ideal factors.