Multiphonon quantum dynamics in cavity optomechanical systems

TL;DR

This paper explores multiphonon quantum dynamics in cavity optomechanical systems with laser pumping, focusing on dispersive regimes and demonstrating methods to monitor phonon behavior via photon detection, with implications for parameter estimation.

Contribution

It introduces a detailed analysis of multiphonon processes in dispersive optomechanical systems and proposes efficient photon-based monitoring techniques for phonon dynamics.

Findings

Identification of multiphonon absorption and emission processes.

Demonstration of photon detection methods to monitor phonon dynamics.

Discussion on extracting system parameters like coupling strength.

Abstract

The multiphonon quantum dynamics in laser-pumped cavity optomechanical samples containing a vibrating mirror is investigated. Especially, we focus on dispersive interaction regimes where the externally applied coherent field frequency detuning from the optical resonator frequency is not equal to the mirror's oscillating frequency or to its multiples. As a result, for moderately strong couplings among the involved subsystems, the quantum dynamics of this complex system is described by multiphonon absorption or emission processes, respectively. Particularly, we demonstrate efficient ways to monitor the phonon quantum dynamics via photon detection. The possibility to extract the relevant sample parameters, for instance, the coupling strength between the mechanical mirror and the electromagnetic field, is also discussed.