Noisy preamplified photodetection for high-fidelity postselection
Craig S. Hamilton, John R. Jeffers · Journal of Physics B Atomic Molecular and Optical Physics · 2009
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.