Noisy preamplified photodetection for high-fidelity postselection

Hamilton, Craig S. and Jeffers, J. (2009) Noisy preamplified photodetection for high-fidelity postselection. Journal of Physics B: Atomic, Molecular and Optical Physics, 42 (11). ISSN 0953-4075

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Abstract

The fidelity of postselecting devices based on direct photon number detection can be significantly improved by insertion of a phase-insensitive optical amplifier in front of the detector. The scheme is simple, and the cost to the probability of obtaining the appropriate detector outcome is low.