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ICOP & ICPET 2017, 23 - : 113-116 Back to browse issues page
Effect of the filter bandwidths of the detection setup on the spectral entanglement of photon pairs generated by spontaneous parametric down-conversion (SPDC)
Ali Mohammadi *1, Dr Atoosa Sadat Arabanian2, Ali Dalafi2, Reza Massudi3
1- Msc student Shahid Beheshti University
2- Assistance professor Shahid Beheshti University
3- Professor
Abstract:   (347 Views)

In this paper, the dependence of the spectral entanglement of photon pairs generated by spontaneous parametric               down-conversion process on the bandwidth of the spectral filters used in the detection setup of photon pairs has been studied. SPDC process is a three-wave mixing that is carried out in a nonlinear crystal and the entangled photon pairs generated by this process are used in various fields such as quantum computing, quantum cryptography and quantum communication. The amount of entanglement of the quantum system (photon pairs) is determined by the entanglement entropy, which provides a measure for disorder in the system. At first eigenvalue equations of the reduced density operator of signal and idler photons according to the parameter of filter bandwidth of the detection setup has been obtained, Then by solving the eigenvalue equations numerically, different values of the Schmidt coefficients is calculated in terms of different values of the spectral bandwidth. Finally the dependence of the spectral entanglement of photon pairs is reported by the entanglement entropy calculations.

Keywords: Spontaneous Parametric Down-Conversion, Entanglement, Entangled Photon Pairs, Single Photon.
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Type of Study: Research | Subject: Special
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Mohammadi A, Arabanian A S, Dalafi A, Massudi R. Effect of the filter bandwidths of the detection setup on the spectral entanglement of photon pairs generated by spontaneous parametric down-conversion (SPDC). ICOP & ICPET. 2017; 23 :113-116
URL: http://opsi.ir/article-1-1270-en.html
Volume 23 - Back to browse issues page
انجمن اپتیک و فوتونیک ایران Optics and Photonics Society of Iran
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