ar X iv : q ua nt - p h / 02 07 11 2 1 9 Ju l 2 00 2 1 Linear optics implementation of general two - photon projective measurement
نویسنده
چکیده
We will present a method of implementation of general projective measurement of two-photon polarization state with the use of linear optics elements only. The scheme presented succeeds with a probability of at least 16 / 1 . For some specific measurements, (e.g. parity measurement) this probability reaches 4 / 1 . PACS number(s): 03.67.-a Recently, Hofmann and Tekeuchi [1] have presented a method of constructing the operator (the so called parity filter) projecting the input state of two photons on a twodimensional subspace of identical horizontal and vertical polarizations. They have achieved the goal with the use of linear optics only. The necessary two-photon interactions have been simulated by detection and post selection process. The restriction to the linear optics is reflected in the probability of success of Hoffman and Takeuchi procedure which is equal to
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تاریخ انتشار 2002