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


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2014-12

AUTHORS

Xin Yang, Dong Yan, Qianqian Bao, Yan Zhang, Cuili Cui

ABSTRACT

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. More... »

PAGES

813-821

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.2478/s11534-014-0520-5

DOI

http://dx.doi.org/10.2478/s11534-014-0520-5

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1017930181


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