Photon exchange and entanglement formation during the transmission through a rectangular quantum barrier

When a quantum particle traverses a rectangular potential created by a quantum field both photon exchange and entanglement between particle and field take place. We present analytic results for the transition amplitudes of any possible photon exchange processes for an incoming plane wave and initial...

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Bibliographic Details
Published inarXiv.org
Main Authors Sulyok, Georg, Durstberger-Rennhofer, Katharina, Summhammer, Johann
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 17.10.2014
Subjects
Entanglement
Exchanging
Photon emission
Physics - Quantum Physics
Plane waves
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Summary:When a quantum particle traverses a rectangular potential created by a quantum field both photon exchange and entanglement between particle and field take place. We present analytic results for the transition amplitudes of any possible photon exchange processes for an incoming plane wave and initial Fock, thermal and coherent field states. We show that for coherent field states the entanglement correlates the particle's position to the photon number in the field instead of the particle's energy as usual. Besides entanglement formation, remarkable differences to the classical field treatment also appear with respect to the symmetry between photon emission and absorption, resonance effects and if the field initially occupies the vacuum state.
ISSN:2331-8422
DOI:10.48550/arxiv.1410.4756