Chip-to-chip quantum photonic interconnect by path-polarization interconversion

• DOI: 10.1364/optica.3.000407
• Publication Date: 2016-04-11T15:42:12Z
• Authors: Jianwei Wang; Damien Bonneau; Matteo Villa; Joshua W. Silvers...; Raffaele Santagati; Shigehito Miki; Taro Yamashita; Mikio Fujiwara; Masahide Sasaki; Hirotaka Terai; Michael G. Tanner; Chandra M. Natarajan; Robert H. Hadfield; Jeremy L. O’Brien; Mark G. Thompson
• Keywords: Quantum sensor

Integrated photonics has enabled much progress towards quantum technologies. Many applications, including communication, sensing, and distributed cloud computing, will require coherent photonic interconnection between separate chip-based sub-systems. Large-scale computing systems architectures may ultimately interconnects to enable scaling beyond the limits of a single wafer "multi-chip" systems. However, coherently interconnecting chips is challenging due fragility these states demanding challenges transmitting photons in at least two media within system. Distribution manipulation qubit entanglement multiple devices one most stringent requirements interconnected Here, we report interconnect demonstrating high-fidelity distribution chips, implemented using state-of-the-art silicon photonics. Path-entangled are generated manipulated on-chip, by interconverting path-encoding polarisation-encoding. We use integrated state analysers confirm Bell-type violation $S$=2.638+-0.039 chips. With improvements loss, this provide new levels flexible for