Generation and dynamic manipulation of frequency degenerate polarization entangled Bell states by a silicon quantum photonic circuit
Dong-Ning Liu,
Jing-Yuan Zheng,
Ling-Jie Yu,
Xue Feng,
Fang Liu,
Kai-Yu Cui,
Yi-Dong Huang,
Wei Zhang
Affiliations
Dong-Ning Liu
Frontier Science Center for Quantum Information, Beijing Innovation Center for Future Chips, Beijing National Research Center for Information Science and Technology (BNRist), Electronic Engineering Department, Tsinghua University, Beijing 100084, China
Jing-Yuan Zheng
Frontier Science Center for Quantum Information, Beijing Innovation Center for Future Chips, Beijing National Research Center for Information Science and Technology (BNRist), Electronic Engineering Department, Tsinghua University, Beijing 100084, China
Ling-Jie Yu
Frontier Science Center for Quantum Information, Beijing Innovation Center for Future Chips, Beijing National Research Center for Information Science and Technology (BNRist), Electronic Engineering Department, Tsinghua University, Beijing 100084, China
Xue Feng
Frontier Science Center for Quantum Information, Beijing Innovation Center for Future Chips, Beijing National Research Center for Information Science and Technology (BNRist), Electronic Engineering Department, Tsinghua University, Beijing 100084, China
Fang Liu
Frontier Science Center for Quantum Information, Beijing Innovation Center for Future Chips, Beijing National Research Center for Information Science and Technology (BNRist), Electronic Engineering Department, Tsinghua University, Beijing 100084, China
Kai-Yu Cui
Frontier Science Center for Quantum Information, Beijing Innovation Center for Future Chips, Beijing National Research Center for Information Science and Technology (BNRist), Electronic Engineering Department, Tsinghua University, Beijing 100084, China
Yi-Dong Huang
Frontier Science Center for Quantum Information, Beijing Innovation Center for Future Chips, Beijing National Research Center for Information Science and Technology (BNRist), Electronic Engineering Department, Tsinghua University, Beijing 100084, China; Beijing Academy of Quantum Information Sciences, Beijing 100193, China
Wei Zhang
Frontier Science Center for Quantum Information, Beijing Innovation Center for Future Chips, Beijing National Research Center for Information Science and Technology (BNRist), Electronic Engineering Department, Tsinghua University, Beijing 100084, China; Beijing Academy of Quantum Information Sciences, Beijing 100193, China; Corresponding author.
A silicon quantum photonic circuit was proposed and realized for the generation and the dynamic manipulation of telecom-band frequency-degenerate polarization entangled Bell states. Frequency degenerate biphoton states were generated in four silicon waveguides by spontaneous four wave mixing. They were transformed to polarization entangled Bell states through on-chip quantum interference and quantum superposition, and then coupled to optical fibers. The property of polarization entanglement in generated photon pairs was demonstrated by two-photon interference under two non-orthogonal polarization bases. The output state could be dynamically switched between two Bell states, which was demonstrated by the simplified Bell state measurement. The experiment results indicated that the manipulation speed supported a modulation rate of several tens kHz, showing its potential on applications of quantum communication and quantum information processing requiring Bell state encoding and dynamic control.
