Time-resolved homodyne characterization of individual quadrature-entangled pulses |
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Authors: | J?Wenger A?Ourjoumtsev R?Tualle-Brouri Email author" target="_blank">P?GrangierEmail author |
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Institution: | (1) Laboratoire Charles Fabry de l Institut d Optique, CNRS UMR 8501, 91403 Orsay, France |
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Abstract: | We describe a simple and efficient set-up to generate and
characterize femtosecond quadrature-entangled pulses. Quantum
correlations equivalent to about 2.5 dB squeezing are efficiently
and easily reached using the non-degenerate parametric
amplification of femtosecond pulses through a single-pass in a
thin (100 m) potassium niobate crystal. The entangled pulses
are then individually sampled to characterize the non-separability
and the entropy of formation of the states. The complete
experiment is analysed in the time-domain, from the pulsed source
of quadrature entanglement to the time-resolved homodyne
detection. This particularity allows for applications in quantum
communication protocols using continuous-variable entanglement. |
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Keywords: | |
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