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Quantum Information Processing
Erschienen in: Quantum Information Processing 1/2016

01.01.2016

Atom–photon entanglement beyond the multi-photon resonance condition

verfasst von: Zeinab Kordi, Saeed Ghanbari, Mohammad Mahmoudi

Erschienen in: Quantum Information Processing | Ausgabe 1/2016

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Abstract

Atom–photon entanglement between the dressed atom and its spontaneous emission is studied in a near-degenerate three-level V-type atomic system in multi-photon resonance condition and beyond it. Taking into account the quantum interference due to the spontaneous emission, the density matrix equations of motion are numerically calculated in two-photon resonance condition and beyond it. The dynamical behavior of these two subsystems is investigated by using the von Neumann entropy. We apply the Floquet decomposition to the equations of motion to solve this time-dependent problem and identify the contribution of the different scattering processes to the atom–photon entanglement. In addition, the impact of the various nonlinear effects on the atom–photon entanglement is introduced in two-photon resonance condition. It is shown that the degree of entanglement (DEM) can be controlled via the intensity and the detuning of the coupling field as well as the quantum interference induced by spontaneous emission. We find that vacuum-induced interference has a major role in phase sensitivity of the DEM; however, beyond the two-photon resonance condition the DEM does not depend on the relative phase of the applied fields. Our results can be used for quantum information processing via entanglement.
Vorheriger Artikel Stabilizing a Bell state by engineering collective photon decay
Nächster Artikel Transferring multipartite entanglement among different cavities

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Metadaten
Titel
Atom–photon entanglement beyond the multi-photon resonance condition
verfasst von
Zeinab Kordi
Saeed Ghanbari
Mohammad Mahmoudi
Publikationsdatum
01.01.2016
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 1/2016
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-015-1168-9

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