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      Coincident count rates in absorbing dielectric media

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          Abstract

          A study of the effects of absorption on the nonlinear process of parametric down conversion is presented. Absorption within the nonlinear medium is accounted for by employing the framework of macroscopic QED and the Green tensor quantization of the electromagnetic field. An effective interaction Hamiltonian, which describes the nonlinear interaction of the electric field and the linear noise polarization field, is used to derive the quantum state of the light leaving a nonlinear crystal. The signal and idler modes of this quantum state are found to be a superpositions of the electric and noise polarization fields. Using this state, the expression for the coincident count rates for both Type I and Type II conversion are found. The nonlinear interaction with the noise polarization field were shown to cause an increase in the rate on the order of 10^{-12} for absorption of 10% per cm. This astonishingly small effect is found to be negligible compared to the decay caused by linear absorption of the propagating modes. From the expressions for the biphoton amplitude it can be seen the maximally entangled states can still be produced even in the presence of strong absorption.

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          Theory of two-photon entanglement for spontaneous parametric down-conversion driven by a narrow pump pulse

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            Theory of two-photon entanglement in type-II optical parametric down-conversion

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              Observation of Spatial Quantum Beating with Separated Photodetectors

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                Author and article information

                Journal
                03 December 2010
                2011-02-23
                Article
                10.1103/PhysRevA.83.023815
                1012.0771
                875287fd-e138-471a-bc9a-3ce2473e12e6

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                History
                Custom metadata
                Phys. Rev. A, 83, 023815 (2011)
                Updated to journal version. 10 Pages, 8 figures
                quant-ph

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