Spatial entanglement of twin quantum images

Details Spatial entanglement of twin quantum images Spatial entanglement of twin quantum images

2000-10-30

arxiv.org/abs/quant-ph/0010108v1

Physics

Quantum Physics

19 pages, 2 figures

Scientific paper

We show that spatial entanglement of two twin images obtained by parametric down-conversion is complete, i.e. concerns both amplitude and phase. This is realised through a homodyne detection of these images which allows for measurement of the field quadrature components. EPR correlations are shown to exist between symmetrical pixels of the two images. The best possible correlation is obtained by adjusting the phase of the local oscillator field (LO) in the area of maximal amplification. The results for quadrature components hold unchanged even in absence of any input image i.e. for pure parametric fluorescence. In this case they are not related to intensity and phase fluctuations.

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