Strong coupling optomechanics mediated by a qubit in the dispersive regime

Year: 2021

Authors: Aporvari A.S.; Vitali D.

Autors Affiliation: School of Science and Technology, Physics Division, University of Camerino, Camerino, I-62032, Italy; Department of Physics, University of Naples “Federico II”, Napoli, I-80126, Italy; Istituto Nazionale di Fisica Nucleare(INFN), Sezione di Perugia, Perugia, I-06123, Italy; Consiglio Nazionale delle Ricerche-Istituto Nazionale di Ottica (CNR-INO), L.go Enrico Fermi 6, Firenze, I-50125, Italy

Abstract: Cavity optomechanics represents a flexible platform for the implementation of quantum technologies, useful in particular for the realization of quantum interfaces, quantum sensors and quantum information processing. However, the dispersive, radiation-pressure interaction between the mechanical and the electromagnetic modes is typically very weak, harnessing up to now the demonstration of interesting nonlinear dynamics and quantum control at the single photon level. It has already been shown both theoretically and experimentally that if the interaction is mediated by a Josephson circuit, one can have an effective dynamics corresponding to a huge enhancement of the single-photon optomechanical coupling. Here we analyze in detail this phenomenon in the general case when the cavity mode and the mechanical mode interact via an off-resonant qubit. Using a Schrieffer-Wolff approximation treatment, we determine the regime where this tripartite hybrid system behaves as an effective cavity optomechanical system in the strong coupling regime.

Journal/Review: ENTROPY

Volume: 23 (8)      Pages from: 966-1  to: 966-9

KeyWords: cavity optomechanics; strong coupling regime; hybrid quantum systems
DOI: 10.3390/e23080966