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Title: Coherent generation of EPR-entangled light pulses mediated by a single trapped atom

Abstract

We show that a single, trapped, laser-driven atom in a high-finesse optical cavity allows for the quantum-coherent generation of entangled light pulses on demand. We report the detailed description of schemes for generating simultaneous and temporally separated pulse pairs, presented in [G. Morigi et al., Phys. Rev. Lett., 96, 023601 (2006)]. The mechanical effect of the laser excitation on the quantum motion of the cold trapped atom mediates the entangling interaction between two cavity modes and between the two subsequent pulses, respectively. The entanglement is of EPR-type, and its degree can be controlled through external parameters. At the end of the generation process the atom is decorrelated from the light field. Possible experimental implementations of the proposals are discussed.

Authors:
; ; ;  [1];  [2];  [3]
  1. Grup d'Optica, Departament de Fisica, Universitat Autonoma de Barcelona, 08193 Bellaterra (Spain)
  2. (Spain)
  3. (Italy)
Publication Date:
OSTI Identifier:
20787002
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.73.033822; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; CAVITY RESONATORS; ENERGY LEVELS; EXCITATION; LASER RADIATION; OPTICS; PHOTON-ATOM COLLISIONS; PULSES; QUANTUM ENTANGLEMENT; RADIATION PRESSURE; TRAPPING; VISIBLE RADIATION

Citation Formats

Morigi, Giovanna, Eschner, Juergen, Mancini, Stefano, Vitali, David, ICFO, Institut de Ciencies Fotoniques, 08860 Castelldefels, Barcelona, and CNISM and Dipartimento di Fisica, Universita di Camerino, 62032 Camerino. Coherent generation of EPR-entangled light pulses mediated by a single trapped atom. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.0.
Morigi, Giovanna, Eschner, Juergen, Mancini, Stefano, Vitali, David, ICFO, Institut de Ciencies Fotoniques, 08860 Castelldefels, Barcelona, & CNISM and Dipartimento di Fisica, Universita di Camerino, 62032 Camerino. Coherent generation of EPR-entangled light pulses mediated by a single trapped atom. United States. doi:10.1103/PHYSREVA.73.0.
Morigi, Giovanna, Eschner, Juergen, Mancini, Stefano, Vitali, David, ICFO, Institut de Ciencies Fotoniques, 08860 Castelldefels, Barcelona, and CNISM and Dipartimento di Fisica, Universita di Camerino, 62032 Camerino. Wed . "Coherent generation of EPR-entangled light pulses mediated by a single trapped atom". United States. doi:10.1103/PHYSREVA.73.0.
@article{osti_20787002,
title = {Coherent generation of EPR-entangled light pulses mediated by a single trapped atom},
author = {Morigi, Giovanna and Eschner, Juergen and Mancini, Stefano and Vitali, David and ICFO, Institut de Ciencies Fotoniques, 08860 Castelldefels, Barcelona and CNISM and Dipartimento di Fisica, Universita di Camerino, 62032 Camerino},
abstractNote = {We show that a single, trapped, laser-driven atom in a high-finesse optical cavity allows for the quantum-coherent generation of entangled light pulses on demand. We report the detailed description of schemes for generating simultaneous and temporally separated pulse pairs, presented in [G. Morigi et al., Phys. Rev. Lett., 96, 023601 (2006)]. The mechanical effect of the laser excitation on the quantum motion of the cold trapped atom mediates the entangling interaction between two cavity modes and between the two subsequent pulses, respectively. The entanglement is of EPR-type, and its degree can be controlled through external parameters. At the end of the generation process the atom is decorrelated from the light field. Possible experimental implementations of the proposals are discussed.},
doi = {10.1103/PHYSREVA.73.0},
journal = {Physical Review. A},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}
  • The Stokes and anti-Stokes components of the spectrum of resonance fluorescence of a single trapped atom, which originate from the mechanical coupling between the scattered photons and the quantized motion of the atomic center of mass, exhibit quantum correlations which are of two-mode-squeezing type. We study and demonstrate the build-up of such correlations in a specific setup, which is experimentally accessible, and where the atom acts as efficient and continuous source of EPR-entangled, two-mode squeezed light.
  • The coherent interaction between a laser-driven single trapped atom and an optical high-finesse resonator allows one to produce entangled multiphoton light pulses on demand. The mechanism is based on the mechanical effect of light. The degree of entanglement can be controlled through the parameters of the laser excitation. Experimental realization of the scheme is within reach of current technology. A variation of the technique allows for controlled generation of entangled subsequent pulses, with the atomic motion serving as intermediate memory of the quantum state.
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