Wigner representation for entanglement swapping using parametric down conversion: the role of vacuum fluctuations in teleportation

被引：4

作者：

Casado, A. ^{[1
]}

Guerra, S. ^{[2
]}

Placido, J. ^{[3
]}

机构：

[1] Univ Seville, Escuela Super Ingn, Dept Fis Aplicada 3, Seville, Spain

[2] Univ Nacl Educ Distancia, Ctr Asociado, Las Palmas Gran Canaria, Spain

[3] Univ Las Palmas Gran Canaria, Grp Ingn Term & Instrumentac, Las Palmas Gran Canaria, Spain

来源：

JOURNAL OF MODERN OPTICS | 2015年 / 62卷 / 05期

关键词：

entanglement swapping; Bell-state analysis; teleportation; parametric down conversion; Wigner representation; zeropoint field; QUANTUM REPEATERS; DELAYED-CHOICE; PARTICLE;

D O I：

10.1080/09500340.2014.983571

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We apply the Wigner formalism of quantum optics in the Heisenberg picture to study the role of the zeropoint field fluctuations in entanglement swapping produced via parametric down conversion. It is shown that the generation of mode entanglement between two initially non-interacting photons is related to the quadruple correlation properties of the electromagnetic field, through the stochastic properties of the vacuum. The relationship between the process of transferring entanglement and the different zeropoint inputs at the non-linear crystal and the Bell-state analyser is emphasized.

引用

页码：377 / 386

页数：10

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