Wigner function description of entanglement swapping using parametric down conversion: the role of vacuum fluctuations in teleportation

Autor:	Casado, A., Guerra, S., Plácido, J.
Rok vydání:	2013
Předmět:	Quantum Physics Computer Science - Information Theory
Druh dokumentu:	Working Paper
Popis:	We apply the Wigner formalism of quantum optics 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 nonlinear crystal and the Bell-state analyser is emphasized. Comment: 23 pages, 2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1311.6062 Zobrazit plný text záznamu View this record from Arxiv