Optical analogue of the dynamical Casimir effect in a dispersion-oscillating fibre

Vezzoli, S., Mussot, A., Westerberg, N. , Kudlinski, A., Dinparasti Saleh, H., Prain, A., Biancalana, F., Lantz, E. and Faccio, D. (2019) Optical analogue of the dynamical Casimir effect in a dispersion-oscillating fibre. Communications Physics, 2, 84. (doi: 10.1038/s42005-019-0183-z)

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The dynamical Casimir effect is the generation of pairs of real particles or photons from the vacuum as a result of a non-adiabatic change of a system parameter or boundary condition. As opposed to standard parametric amplification where the modulation occurs both in space and in time, this fundamental process requires a pure modulation in time, which makes its detection particularly challenging at optical frequencies. In this paper we experimentally demonstrate a realization of the analogue dynamical Casimir effect in the near-infrared optical regime in a dispersion-oscillating photonic crystal fibre. The experiments are based on the equivalence of the spatial modulation of the fibre core diameter to a pure temporal modulation when this is considered in the co-moving frame of the travelling pump pulse. We provide evidence of optical dynamical Casimir effect by measuring quantum correlations between the spectrally resolved photon pairs and prove their non-classical nature with photon anti-bunching.

Item Type:Articles
Additional Information:This work was partly supported by the Agence Nationale de la Recherche through the High Energy All Fibre Systems (HEAFISY), the Labex Centre Europeen pour les Mathematiques, la Physique et leurs Interactions (CEMPI) and Equipex Fibres optiques pour les hauts ux (FLUX) through the Programme Investissements d'Avenir, by the Ministry of Higher Education and Research, Hauts de France council and European Regional Development Fund (ERDF) through the Contrat de Projets Etat-Region (CPER Photonics for Society, P4S) and FEDER through the HEAFISY project. D. F. acknowledges financial support from the European Research Council under the European Union Seventh Framework Programme (FP/2007-2013)/ERC GA306559 and EPSRC (UK, Grant No. EP/P006078/2). N.W. acknowledges support from EPSRC CM-CDT Grant No. EP/L015110/1.
Glasgow Author(s) Enlighten ID:Prain, Dr Angus and Vezzoli, Dr Stefano and Faccio, Professor Daniele and Westerberg, Dr Niclas
Authors: Vezzoli, S., Mussot, A., Westerberg, N., Kudlinski, A., Dinparasti Saleh, H., Prain, A., Biancalana, F., Lantz, E., and Faccio, D.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Communications Physics
Publisher:Nature Research
ISSN (Online):2399-3650
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in Communications Physics 2:84
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
3030210Black Hole Superradiance in Rotating Fluids (SURF)Daniele FaccioEngineering and Physical Sciences Research Council (EPSRC)EP/P006078/2P&S - Physics & Astronomy