Purity and entanglement of two-photon polarization states generated by spontaneous parametric down-conversion |
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| Authors: | Nadja K. Bernardes C.H. Monken |
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| Affiliation: | a Instituto de Física, Universidade de São Paulo, Caixa Postal 66318, São Paulo, SP 05315-970, Brazil
b Departamento de Física, Universidade Federal de Minas Gerais, Caixa Postal 702, Belo Horizonte, MG 30123-970, Brazil |
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| Abstract: | We elucidate the dependence of purity and entanglement of two-photon states generated by spontaneous parametric down-conversion on the parameters of the source, such as crystal length, pump beam divergence, frequency bandwidth, and detectors angular aperture. The effect of crystal anisotropy is taken into account. Numerical simulations are presented for two types of commonly used source configurations. |
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| Keywords: | 42.65.Lm 42.50.Dv 03.67.Bg 03.65.Ud |
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