Figure 4
From: Physical interpretation of nonlocal quantum correlation through local description of subsystems
Schematic of an integrated silicon-photonics quantum device. The quantum device is capable of generating, manipulating and analyzing maximally path-entangled states. The device is fabricated on the silicon-on-insulator platform. Lines are silicon nanophotonic waveguides with the size of 450 nm \(\times\) 220 nm, and yellow parts are thermo-optic phase shifters that can be precisely controlled in experiment. A continuous wave laser light (at the wavelength of 1550.12 nm) was used to pump two photon-pair sources, producing a pair of path-entangled photons via the spontaneous four-wave mixing (sFWM) process. The entangled photons were locally manipulated and analyzed by Alice (signal photon at 1545.31 nm) and Bob (idler photon at 1554.91 nm), respectively, which were implemented by the terminate Mach-Zehnder interferometers (MZIs). The two photons are measured by two superconducting nanowire single-photon detectors (SNSPDs), and their coincidence were recorded by a time tagger.
