Research Article
Entanglement Degree Characterization of Spontaneous Parametric-Down Conversion Biphotons in Frequency Domain
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@INPROCEEDINGS{10.1007/978-3-642-11731-2_6, author={Giorgio Brida and Valentina Caricato and Marco Genovese and Marco Gramegna and Mikhail Fedorov and Sergey Kulik}, title={Entanglement Degree Characterization of Spontaneous Parametric-Down Conversion Biphotons in Frequency Domain}, proceedings={Quantum Communication and Quantum Networking. First International Conference, QuantumComm 2009, Naples, Italy, October 26-30, 2009, Revised Selected Papers}, proceedings_a={QUANTUMCOMM}, year={2012}, month={10}, keywords={Entanglement biphotons SPDC}, doi={10.1007/978-3-642-11731-2_6} }- Giorgio Brida
Valentina Caricato
Marco Genovese
Marco Gramegna
Mikhail Fedorov
Sergey Kulik
Year: 2012
Entanglement Degree Characterization of Spontaneous Parametric-Down Conversion Biphotons in Frequency Domain
QUANTUMCOMM
Springer
DOI: 10.1007/978-3-642-11731-2_6
Abstract
We present an experiment addressed to verify the validity of the entanglement quantifier , defined as the ratio between single counts and coincidence distribution width for pure biphoton states ge-nerated by short pump pulses. We demonstrate that this ratio can be efficient to estimate entanglement degree in frequency domain. Our work has been performed with a femto second pulsed laser pump addressed to a LiIO crystal generating correlated biphotons through collinear degenerate type-I SPDC. To study the dependence of on the length of the crystal we performed two sequence of measurements for each crystal firstly with a 10 mm and then with a 5 mm.
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