Figure | Working principle of the programmable optical processor. (IMAGE)
Caption
Figure | Working principle of the programmable optical processor. (a) Conceptual schematic of the photonic platform. Three liquid-crystal spatial light modulators (LC-SLMs), cell-wise driven by a modulated electrical field, implement the target operator U by imprinting a programmable phase pattern (256 discrete levels) onto the input optical field. Optical modes, featuring transverse phase modulation, are imaged on a sensor in the focal plane of a lens (f), where each region corresponds to a different spatial mode. (b) Representative experimental results. Each run of the experiment, controlled via software, realizes the evolution corresponding to a given number of steps of a quantum walk on discrete lattices. The image shows the normalized spatial probability distributions for a quantum walk on a two-dimensional grid at different time steps (t). Experimental results are in good agreement with theoretical predictions.
Credit
Francesco Di Colandrea et al.
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CC BY