Resolving Mutually Coherent Bright Point-Sources

• URL: http://arxiv.org/abs/2111.02233v1
• Date: Wed, 3 Nov 2021 13:54:43 GMT
• Title: Resolving Mutually Coherent Bright Point-Sources
• Authors: Ilya Karuseichyk, Giacomo Sorelli, Manuel Gessner, Mattia Walschaers and Nicolas Treps
• Abstract summary: We show that the sensitivity of spatial mode demultiplexing saturates the quantum Fisher information, for all known cases, even for non-Gaussian states of the sources.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: We analyze the problem of resolving two point-sources in the case of mutually coherent sources with arbitrary quantum statistics, mutual phase, relative and absolute intensity. We use a sensitivity measure based on the method of moments and compare direct imaging with spatial mode demultiplexing, analytically proving the advantage of the latter. We show that the sensitivity of spatial mode demultiplexing saturates the quantum Fisher information, for all known cases, even for non-Gaussian states of the sources.

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