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Mapping between multi-photon polarization state and single-photon spatial qudit and its applications

Lin Qing

Mapping between multi-photon polarization state and single-photon spatial qudit and its applications

Lin Qing
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Publishing process
  • Received Date:  19 October 2010
  • Accepted Date:  11 January 2011
  • Published Online:  05 April 2011

Mapping between multi-photon polarization state and single-photon spatial qudit and its applications

  • 1. College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China

Abstract: Based on a special controlled-NOT gate, a multi-photon state encoded in polarizations of photons could be transformed into the corresponding single photon qudit encoded in spatial mode. It will make the processing on multi-photon change into the operation on a single-photon, if the inverse transformation from a single photon qudit back to a multi-photon state could be realized also. Associated with linear optical multi-port interferometer for single-photon unitary operation, the positive-operator value measurement and the universal unitary operation for multi-photon state are realized. This approach is more efficient than the previous one with decomposition into two-qubit gates in the circuit-based quantum computation, and it is feasible with using the current experimental technology.

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