Dispersion-independent high-visibility quantum interference in ultrafast parametric down-conversion
نویسندگان
چکیده
We demonstrate the effective removal of intrinsic distinguishability between entangled-photon pairs in femtosecond spontaneous parametric down-conversion. High-visibility quantum interference is recovered (an increase to 96% from 17%) while preserving the high photon-flux density associated with the use of long nonlinear crystals. This new technique is expected to serve as a basic component in the preparation of multiphoton entangled states.
منابع مشابه
Comment on "dispersion-independent high-visibility quantum interference in ultrafast parametric down-conversion".
Recently Atatüre et al. claimed to " recover " high-visibility quantum interference in femtosecond pulse pumped type-II spontaneous parametric down-conversion (SPDC) using neither spectral postselection nor a thin nonlinear crystal [1]. We show in this Comment that the interpretation of experimental data as well as the theory presented in Ref. [1] are incorrect and discuss why such a scheme can...
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ورودعنوان ژورنال:
- Physical review letters
دوره 84 4 شماره
صفحات -
تاریخ انتشار 2000