Quantum Information Processing

Integrated photonics is one of the leading platforms for building quantum information processors. This technology is based on generating pure single photons, preparing entangled states in integrated waveguide circuits and efficient single photon detection. Lithium niobate-on-insulator (LNOI) is an emerging integrated photonics platform that is extremely well suited for quantum computing applications. Photon-pairs can be generated by spontaneous parametric down-conversion with very high efficiency in LNOI, low loss and fast programmable waveguide circuits enable encoding of quantum information in the superposition and entangled states of the single photons and efficient superconducting detectors can be integrated on-chip.

We are researching the integration of these three building blocks to develop large-scale quantum photonic processors for applications such as boson sampling and quantum key distribution. The core components include periodically poled lithium niobate waveguides for efficient and pure photon pair generation and low loss integrated circuits.

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