Shaping Dynamical Casimir Photons

Temporal modulation of the quantum vacuum through fast motion of a neutral body or fast changes of its optical properties is known to promote virtual into real photons, the so-called dynamical Casimir effect. Empowering modulation protocols with spatial control could enable the shaping of spectral,...

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Bibliographic Details
Published in:Universe (Basel) Vol. 7; no. 6; p. 189
Main Authors: Dalvit, Diego A. R., Kort-Kamp, Wilton J. M.
Format: Journal Article
Language:English
Published: Basel MDPI AG 01.06.2021
Subjects:
Atoms & subatomic particles
dynamical Casimir effect
Electromagnetism
Optical properties
quantum metasurfaces
spatiotemporal modulation
ISSN:2218-1997, 2218-1997
Online Access:Get full text
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Summary:Temporal modulation of the quantum vacuum through fast motion of a neutral body or fast changes of its optical properties is known to promote virtual into real photons, the so-called dynamical Casimir effect. Empowering modulation protocols with spatial control could enable the shaping of spectral, spatial, spin, and entanglement properties of the emitted photon pairs. Space–time quantum metasurfaces have been proposed as a platform to realize this physics via modulation of their optical properties. Here, we report the mechanical analog of this phenomenon by considering systems in which the lattice structure undergoes modulation in space and in time. We develop a microscopic theory that applies both to moving mirrors with a modulated surface profile and atomic array meta-mirrors with perturbed lattice configuration. Spatiotemporal modulation enables motion-induced generation of co- and cross-polarized photon pairs that feature frequency-linear momentum entanglement as well as vortex photon pairs featuring frequency-angular momentum entanglement. The proposed space–time dynamical Casimir effect can be interpreted as induced dynamical asymmetry in the quantum vacuum.
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USDOE
LDRD
ISSN:2218-1997
2218-1997
DOI:10.3390/universe7060189