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L'Effet Casimir Dynamique et son lien avec l'Amplification Paramétrique en Optique Quantique

Abstract : According to Quantum Field Theory, any non-uniformly accelerated scatterer in vacuum experiences a dissipative force due to vacuum fluctuations. Because of energy conservation, photons should be emitted. This theoretical prediction, called Dynamical Casimir Effect, is presented in the first part of the thesis. We calculate the radiation emitted by oscillating mirrors, in vacuum and in thermal baths. The scattering of fields inside an oscillating cavity is computed through an iteration in frequency domain so as to circumvent the divergences resulting from previous approaches and to extend calculations above the threshold of parametric oscillation. In the second part of the thesis, we show that it is possible to generate a phenomenon analogous to Dynamical Casimir Effect by squeezing vacuum fluctuations inside
devices like Optical Parametric Amplifiers (OPA). In order to reproduce the transformation of the fields scattered by oscillating mirrors, we study various systems made up of mirrors and chi(2) crystals pumped with laser. After a detailed analysis of experimental constraints, we propose a practical realization of the analogy with a monolithic micro-OPA, giving hope for a radiation widely exceeding the one achievable through mechanical means.
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https://tel.archives-ouvertes.fr/tel-00165149
Contributor : François-Xavier Dezael <>
Submitted on : Tuesday, July 24, 2007 - 5:49:06 PM
Last modification on : Thursday, December 10, 2020 - 12:36:39 PM
Long-term archiving on: : Thursday, April 8, 2010 - 8:54:08 PM

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  • HAL Id : tel-00165149, version 1

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François-Xavier Dezael. L'Effet Casimir Dynamique et son lien avec l'Amplification Paramétrique en Optique Quantique. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2007. Français. ⟨tel-00165149⟩

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