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

Stefano Vezzoli, Arnaud Mussot, Niclas Westerberg, Alexandre Kudlinski, Hatef Dinparasti Saleh, Angus Prain, Fabio Biancalana, Eric Lantz, Daniele Faccio

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Abstract

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.

Original languageEnglish
Article number84
JournalCommunications Physics
Volume2
DOIs
Publication statusPublished - 19 Jul 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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