Witness assisted eigenspectra solver on a silicon quantum photonic simulator

Gentile AA, Santagati R, Wang J, Paesani S, Wiebe N, McClean J, Bonneau D, Silverstone JW, Morley-Short S, Shadbolt PJ, Tew DP, Zhou X
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et al

We demonstrate a new protocol capable of finding ground and excited states of physical Hamiltonians via an eigenstate witness. The experimental test employs a silicon quantum photonic device, embedding arbitrary controlled unitary operations.