Quantum information transmission

  • Authors:

  • Lei Wang;Jie-Hui Huang;Jonathan P. Dowling;Shi-Yao Zhu

  • Affiliations:

  • Beijing Computational Science Research Center, Beijing, China 100084 and College of Physics, Jilin University, Changchun, China 130012;Beijing Computational Science Research Center, Beijing, China 100084;Beijing Computational Science Research Center, Beijing, China 100084 and Department of Physics and Astronomy, Hearne Institute for Theoretical Physics, Louisiana State University, Baton Rouge, USA ...;Beijing Computational Science Research Center, Beijing, China 100084

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2013

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Abstract

We present a scheme of quantum information transmission, which transmits the quantum information contained in a single qubit via the quantum correlation shared by two parties (a two-qubit channel), whose quantum discord is non-zero. We demonstrate that quantum correlation, which may have no entanglement, is sufficient to transmit the information needed to reconstruct a quantum state. When the correlation matrix of the two-qubit channel is of full rank (rank three), the information of the qubit (in either a mixed state or a pure state) can be transmitted. The quantum discord of a channel with rank larger than or equal to three is always non-zero. Therefore, non-zero quantum discord is also necessary for our quantum information transmission protocol. The scheme may be useful in remote state tomography and remote state preparation.