Volume 128, Number 2, October 2019
|Number of page(s)||7|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||03 January 2020|
Quantum fluctuations of the friction force induced by the dynamical Casimir emission
INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento - I-38123 Povo (TN), Italy
Received: 20 September 2019
Accepted: 1 November 2019
We study a quantum model of dynamical Casimir effect in an optical cavity enclosed by a freely moving mirror attached to a harmonic spring. The quantum fluctuations of the friction force exerted by the dynamical Casimir emission onto the moving mirror are investigated, as well as their consequences on the quantum state of the mirror oscillation. Observable signatures of the interplay of the nonlinear nature of the effective mirror-cavity coupling and of the discreteness of the emitted photons are pointed out, in particular as a fast diffusion of the mirror oscillation phase. These results are interpreted in the language of quantum field theories on curved space-times as a breakdown of the standard semiclassical theory of the backreaction.
PACS: 42.50.Ct – Quantum description of interaction of light and matter; related experiments / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 12.20.-m – Quantum electrodynamics
© EPLA, 2020
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