A pulsed source of continuous variable polarization entanglement

Details A pulsed source of continuous variable polarization entanglement A pulsed source of continuous variable polarization entanglement

2003-02-11

arxiv.org/abs/quant-ph/0302083v1

Physics

Quantum Physics

Scientific paper

10.1088/1464-4266/5/4/355

We have experimentally demonstrated polarization entanglement using continuous variables in an ultra-short pulsed laser system at telecommunication wavelengths. Exploiting the Kerr-nonlinearity of a glass fibre we generated a polarization squeezed pulse with S2 the only non-zero Stokes parameter thus S1 and S3 being the conjugate pair. Polarization entanglement was generated by interference of the polarization squeezed field with a vacuum on a 50:50 beam splitter. The two resultant beams exhibit strong quantum noise correlations in S1 and S3. The sum noise signal of S3 was at the respective shot noise level and the difference noise signal of S1 fell 2.9dB below this value.

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