抄録
We propose a large-scale quantum simulator by multiplexing optical quantum modes in the frequency
domain and arbitrarily mixing them as a boson sampling optical circuit to obtain Franc Condon Factor of
large molecules. By shaping 785-nm femtosecond pump laser pulses, we generate multimode squeezed
states via spontaneous parametric down conversion with a type-II PPKTP. Sum frequency mixing using
a type-II PPLN between the multimode squeezed states and gate pulses that are shaped to the arbitrary
superposition of the multi-spectral mode functions acts as programmable quantum gating. We complete
the quantum simulation by time-dependent photon number detection at the sum-frequency wavelength at
517 nm. We describe the advantage of quantum mode manipulation in the frequency domain and place a
special emphasis on group velocity dispersion engineering required to achieve them.
