Fig. 3: Scheme of the six-mode IPP.
From: Modular quantum-to-quantum Bernoulli factory in an integrated photonic processor
a, Interferometer layout. The device is a six-mode fully programmable interferometer based on the universal rectangular architecture45, allowing the implementation of arbitrary linear optical transformations. b, Each BS of arbitrary reflectivity R, required in the scheme described elsewhere45, is implemented via a module composed of a Mach–Zehnder interferometer with symmetric 50/50 directional couplers, and two tunable phase shifts θ and φ. The programmable phases are implemented via thermo-optic phase shifters. c, Picture of the actual device. The footprint of the circuit is 82 × 20 mm2.
