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Journals and Conferences
Current single photon sources produce single photons with probability p<1. We show how to increase p via postprocessing with linear optics and photodetection, and discuss the limitations to this method
Adaptive techniques make practical many quantum measurements that would otherwise be beyond current laboratory capabilities. For example, they allow discrimination of nonorthogonal states with a probability of error equal to the Helstrom bound, measurement of the phase of a quantum oscillator with accuracy approaching (or in some cases attaining) the… (More)
An experiment is proposed for performing adaptive phase measurements on a continuous squeezed beam such that the variance is below the standard quantum limit. The theory takes into account many issues ignored in previous work.
We demonstrate experimental Heisenberg-limited scaling of the variance in optical phase measurements. Our algorithm replaces entangled states - often thought essential for Heisenberg scaling - with single photons, multiple phase shift passes, and adaptive measurement.
We present experimental results of the use of continuous adaptive feedback in quantum optical measurement of phase of the sidebands on continuous-wave (cw) coherent light, consistent with theoretical predictions (Berry and Wiseman, 2002).
We show the necessary and sufficient conditions on loss for valid CHSH-Bell experiments, and propose an experiment with loss which should violate Tsirelsonpsilas bound for entangled states.
We present experimental results for a proof-of-principle demonstration of a quantum key-distribution system using macroscopic non-classical optical pulses. The results show a bit error rate of less than the 11% threshold required for absolute security