A three-layer free-space setup with SLMs and wave plates implements unitaries equivalent to 30-step quantum walks on 1D/2D lattices, distributing one input to over 7000 outputs while supporting disorder, gauge fields, and topology.
and Marrucci, L., Two-dimensional topo- logical quantum walks in the momentum space of struc- tured light, Optica 7, 108 (2020)
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Compact and programmable large-scale optical processor in free space
A three-layer free-space setup with SLMs and wave plates implements unitaries equivalent to 30-step quantum walks on 1D/2D lattices, distributing one input to over 7000 outputs while supporting disorder, gauge fields, and topology.