Fiber-optic realization of anisotropic depolarizing quantum channels

Details Fiber-optic realization of anisotropic depolarizing quantum channels Fiber-optic realization of anisotropic depolarizing quantum channels

2007-07-25

arxiv.org/abs/0707.3728v2

J. Opt. Soc. Am. B 25, 668 (2008)

Physics

Quantum Physics

7 pages, 6 figures

Scientific paper

10.1364/JOSAB.25.000668

We employed an electrically-driven polarization controller to implement anisotropic depolarizing quantum channels for the polarization state of single photons. The channels were characterized by means of ancilla-assisted quantum process tomography using polarization-entangled photons generated in the process of spontaneous parametric down-conversion. The demonstrated depolarization method offers good repeatability, low cost, and compatibility with fiber-optic setups. It does not perturb the modal structure of single photons, and therefore can be used to verify experimentally protocols for managing decoherence effects based on multiphoton interference.

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