Non separable Werner states in spontaneous parametric down-conversion

Details Non separable Werner states in spontaneous parametric down-conversion Non separable Werner states in spontaneous parametric down-conversion

2005-10-19

arxiv.org/abs/quant-ph/0510153v1

Phys. Rev. A 73, 032312 (2006)

Physics

Quantum Physics

16 pages, 6 figures

Scientific paper

10.1103/PhysRevA.73.032312

The multiphoton states generated by high-gain spontaneous parametric down-conversion (SPDC) in presence of large losses are investigated theoretically and experimentally. The explicit form for the two-photon output state has been found to exhibit a Werner structure very resilient to losses for any value of the gain parameter, g. The theoretical results are found in agreement with the experimental data. The last ones are obtained by quantum tomography of the state generated by a high-gain SPDC.

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