Figure 1
From: Guaranteed violation of a Bell inequality without aligned reference frames or calibrated devices
Bell violations with random measurements.
(a) Schematic representation of a Bell test. (b) Schematic of the integrated waveguide chip used to implement the new schemes described here. Alice and Bob's measurement circuits consist of waveguides to encode photonic qubits, directional couplers that implement Hadamard-like operations, thermal phase shifters to implement arbitrary measurements and detectors.
