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2014 | 12 | 12 | 813-821
Tytuł artykułu

The influence of spontaneously generated coherence on atom-photon entanglement in a Λ-type system with an incoherent pump

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Owing to interference induced by spontaneous emission, the density-matrix equations in a three-level Λ-type system have an additional coherence term, which plays a critical role in modulating the inversionless gain and electromagnetically induced transparency effect. In addition, it is shown that spontaneously generated coherence (SGC) has an effect on the entanglement between an atom and a photon of the coupling laser field by calculating the degree of entanglement (DEM) of the atomic system. In this paper, we investigate the influence of the SGC effect on atom-photon entanglement in a Λ-type system, which generally remains a high entangled state. When an incoherent pump source is introduced, we find that the SGC effect could exert considerable influence on the atom reduced entropy under certain conditions for both transient and steady states. More interestingly, such an incoherent pump field could actively affect the short-time dynamic behaviors of the transient quantum entangled state at a certain range of pump rate as a typical coherent case.
Wydawca

Czasopismo
Rocznik
Tom
12
Numer
12
Strony
813-821
Opis fizyczny
Daty
wydano
2014-12-01
online
2014-08-27
Twórcy
autor
  • College of Physics, Jilin University, Qianjin Street 2699, 130012, Changchun, China, 15943007270@163.com
autor
  • School of Science, Changchun University, Weixing Road 6543, 130022, Changchun, China, ydbest@126.com
autor
  • School of Physics, Liaoning University, Chongshan Middle Road 66, 110036, Shenyang, China
autor
  • College of Physics, Northeast Normal University, People Street 5268, 130024, Changchun, China
autor
  • College of Physics, Jilin University, Qianjin Street 2699, 130012, Changchun, China
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-014-0520-5
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