Related papers: Reducing of the Uncertainty Product of Coherent Light through Multi-Photon Interference

Reducing of the Uncertainty Product of Coherent Light through Multi-Photon Interference

URL: http://arxiv.org/abs/2404.00496v1
Date: Sat, 30 Mar 2024 23:28:07 GMT
Title: Reducing of the Uncertainty Product of Coherent Light through Multi-Photon Interference
Authors: Sangbae Kim, Joachim Stohr, Fabian Rotermund, Byoung S. Ham,
Abstract summary: By use of a Mach-Zehnder interferometer, we observe a fringe width reduction of the conventional interference pattern. Our scheme does not require squeezed or entangled light to overcome the standard quantum limit.
Score: 10.871383127225156
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We demonstrate theoretically and experimentally how the diffraction and interferometric resolution limit for single-mode coherent cw laser light can be overcome by multi-photon interference. By use of a Mach-Zehnder interferometer, operated in the single input and single or double output port geometries, we observe a fringe width reduction of the conventional interference pattern, predicted by the wave or single photon quantum theory, by a factor of up to $1/\sqrt{2N}$ through coincident detection of $N=2,3,4$ photons. Our scheme does not require squeezed or entangled light to overcome the standard quantum limit and greatly facilitates precision interferometry experiments.

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