Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session R28: Hybrid Quantum Systems
8:00 AM–11:00 AM,
Thursday, March 18, 2021
Sponsoring Units: DAMOP DQI
Chair: Gaurav Bahl, UIUC
Abstract: R28.00012 : Virtual and real dynamical Casimr effects in optomechanical systems*
10:12 AM–10:24 AM
Omar Di Stefano
(Univ of Messina)
(Univ of Messina)
(Riken Japan and Univ. Michigan USA)
We studied the DCE using a fully quantum-mechanical description and without linearizing the dynamics [Phys. Rev. X, 011031 (2018)] . We have shown that the resonant generation of photons from the vacuum is determined by a ladder of mirror-field vacuum Rabi splittings. We find that vacuum emission can originate from the free evolution of an initial pure mechanical excited state, in analogy with the spontaneous emission from excited atoms. We also show that the DCE can also be under incoherent mechanical pumping [Phys. Rev. A, 022501 (2019)].
We then applied this framework to study the interaction of two mechanical oscillators mediated by the exchange of virtual photon pairs. Specifically, we demonstrated that mechanical quantum excitations can be coherently transferred among spatially separated mechanical oscillators, through a dissipationless quantum bus, due to the exchange of virtual photon pairs [Phys. Rev. Lett. 030402 (2019)]. This system can also operate as a mechanical parametric downconverter.
*This work was supported by the ARO, JSPS, JST, NTT, AOARD, FQXi, CFI,NSERCC
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