Characterization of Spectral Entanglement of Spontaneous Parametric-Down Conversion Biphotons

Details Characterization of Spectral Entanglement of Spontaneous Parametric-Down Conversion Biphotons Characterization of Spectral Entanglement of Spontaneous Parametric-Down Conversion Biphotons

2009-04-20

arxiv.org/abs/0904.3009v1

EPL 87 (2009) 64003

Physics

Quantum Physics

Scientific paper

10.1209/0295-5075/87/64003

We verified operational approach based on direct measurement of entanglement degree for bipartite systems. In particular spectral distributions of single counts and coincidence for pure biphoton states generated by train of short pump pulses have been measured and entanglement quantifier calculated. The approach gives upper bound of entanglement stored in total biphoton states, which can reach extremely high value up to $10^{4}-10^{5}$.

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