Experimental investigation of criteria for continous variable entanglement
Date
2003-01-29
Authors
Bowen, Warwick P
Schnabel, R
Lam, Ping Koy
Ralph, Timothy Cameron
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American Physical Society
Abstract
We generate a pair of entangled beams from the interference of two amplitude squeezed beams. The entanglement is quantified in terms of EPR paradox and inseparability criteria, with both results clearly beating the standard quantum limit. We experimentally analyze the effect of decoherence on each criterion and demonstrate qualitative differences. We also characterize the number of required and excess photons present in the entangled beams and provide contour plots of the efficacy of quantum information protocols in terms of these variables.
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Keywords
Keywords: Bandwidth; Gaussian noise (electronic); Light interference; Optical beam splitters; Paramagnetic resonance; Photons; Spectrum analyzers; Decoherence; Quantum theory
Citation
Physical Review Letters 90.4 (2003): 043601/1-4
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Physical Review Letters
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Journal article
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