Mr. Louis Delloye Profile

Louis Delloye

at Lab Kastler Brossel

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Proceedings Article | 7 March 2022 Poster

Tuneable spin-glass optical simulator based on multiple light scattering

Louis Delloye, Gianni Jacucci, Davide Pierangeli, Mushegh Rafayelyan, Claudio Conti, Sylvain Gigan

Proceedings Volume PC12019, PC1201912 (2022) https://doi.org/10.1117/12.2625600

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The race to heuristically solve non-deterministic polynomial-time (NP) problems through efficient methods is ongoing. Recently, optics was demonstrated as a promising tool to find the ground state of a spin-glass Ising Hamiltonian, which represents an archetypal NP problem. However, achieving completely programmable spin couplings in these large-scale optical Ising simulators remains an open challenge. Here, by exploiting the knowledge of the transmission matrix of a random medium, we experimentally demonstrate the possibility of controlling the couplings of a fully connected Ising spin system. By further tailoring the input wavefront we showcase the possibility of modifying the Ising Hamiltonian both by accounting for an external magnetic field and by controlling the number of degenerate ground states and their properties and probabilities. Our results represent a relevant step toward the realisation of fully-programmable Ising machines on thin optical platforms, capable of solving complex spin-glass Hamiltonians on a large scale.

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