Noise-free high-efficiency photon-number-resolving detectors

Details Noise-free high-efficiency photon-number-resolving detectors Noise-free high-efficiency photon-number-resolving detectors

2005-06-21

arxiv.org/abs/quant-ph/0506175v1

Physical Review A, 71, 061803(R) (2005)

Physics

Quantum Physics

4 pages, 4 figures Published in Physical Review A, Rapid Communications, 17 June 2005

Scientific paper

10.1103/PhysRevA.71.061803

High-efficiency optical detectors that can determine the number of photons in a pulse of monochromatic light have applications in a variety of physics studies, including post-selection-based entanglement protocols for linear optics quantum computing and experiments that simultaneously close the detection and communication loopholes of Bell's inequalities. Here we report on our demonstration of fiber-coupled, noise-free, photon-number-resolving transition-edge sensors with 88% efficiency at 1550 nm. The efficiency of these sensors could be made even higher at any wavelength in the visible and near-infrared spectrum without resulting in a higher dark-count rate or degraded photon-number resolution.

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