Cavity-assisted spontaneous emission as a single-photon source: Pulse shape and efficiency of one-photon Fock-state preparation

M. Khanbekyan, D.-G. Welsch, C. Di Fidio, and W. Vogel
Phys. Rev. A 78, 013822 – Published 15 July 2008

Abstract

Within the framework of exact quantum electrodynamics in dispersing and absorbing media, we have studied the quantum state of the radiation emitted from an initially in the upper state, prepared two-level atom in a high-Q cavity, including the regime where the emitted photon belongs to a wave packet that simultaneously covers the areas inside and outside the cavity. For both continuing atom-field interaction and short-term atom-field interaction, we have determined the spatiotemporal shape of the excited outgoing wave packet and calculated the efficiency of the wave packet to carry a one-photon Fock state. Furthermore, we have made contact with quantum noise theories where the intracavity field and the field outside the cavity are regarded as approximately representing independent degrees of freedom such that two separate Hilbert spaces can be introduced.

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  • Received 31 October 2007

DOI:https://doi.org/10.1103/PhysRevA.78.013822

©2008 American Physical Society

Authors & Affiliations

M. Khanbekyan* and D.-G. Welsch

  • Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena, Germany

C. Di Fidio and W. Vogel

  • Arbeitsgruppe Quantenoptik, Institut für Physik, Universität Rostock, D-18051 Rostock, Germany

  • *mkh@tpi.uni-jena.de

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Vol. 78, Iss. 1 — July 2008

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