Abstract
We investigate entanglement in the above-threshold optical parametric oscillator, both theoretically and experimentally, and discuss its potential applications to quantum information. The fluctuations measured in the subtraction of signal and idler amplitude quadratures are , or dB, and in the sum of phase quadratures they are , or dB. A detailed experimental study of the noise behavior as a function of pump power is presented, and the discrepancies with theory are discussed.
© 2007 Optical Society of America
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