Programmable Quantum Photonic Processor Using Silicon Photonics
Technical Report,01 Jun 2014,01 Sep 2016
Massachusetts Institute of Technology Cambridge United States
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Photons play a central role in many areas of quantum information processing and quantum sensing, ranging from linear optics quantum computing and quantum simulation to quantum communications. A central problem in many of these applications is the need to control many spatial and temporal modes with high efficiency and precision. Photonic integrated circuits can contain closely-spaced and extremely phase-stable components that enable precision control of many spatial and temporal modes in dielectric waveguides. This program developed photonic integrated circuits PICs based on the silicon-on-insulator platform. We developed large-scale PICs with cascaded Mach-Zehnder interferometers MZI with precision electro-optic modulators. These PICs have very low internal losses 0.1 dBMZI and achieve exceptionally high contrast interference 80 dB over tens of spatial modes. These fully programmable mode transformers have driven experimental and theoretical advances in quantum simulation, cluster-state quantum computing, all-optical quantum repeaters, neuromorphic computing, and other applications. In addition, we developed new schemes for ballistic quantum computation, new methods for high-efficiency single photon sources, a new approach for 3-photon cluster state generation that forms the essential ingredient for percolation-based generation of scalable cluster states, and quantum logic gates based on weak optical nonlinearities.
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