Optimal control of coherent light scattering for binary decision problems

• URL: http://arxiv.org/abs/2108.03755v2
• Date: Fri, 17 Dec 2021 17:09:44 GMT
• Title: Optimal control of coherent light scattering for binary decision problems
• Authors: Dorian Bouchet, Lukas M. Rachbauer, Stefan Rotter, Allard P. Mosk, Emmanuel Bossy
• Abstract summary: We present a framework to calculate and minimize the Helstrom bound using coherent probe fields with tailored spatial distributions. We experimentally study a target located in between two disordered scattering media.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Due to quantum noise fluctuations, the rate of error achievable in decision problems involving several possible configurations of a scattering system is subject to a fundamental limit known as the Helstrom bound. Here, we present a general framework to calculate and minimize this bound using coherent probe fields with tailored spatial distributions. As an example, we experimentally study a target located in between two disordered scattering media. We first show that the optimal field distribution can be directly identified using a general approach based on scattering matrix measurements. We then demonstrate that this optimal light field successfully probes the presence of the target with a number of photons that is reduced by more than two orders of magnitude as compared to unoptimized fields.

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