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Paper   IPM / Physic / 6967
School of Physics
  Title:   Quantum Dense Coding by Spatial State Entanglement
  Author(s): 
1.  O. Akhavan
2.  A.T. Rezakhani
3.  M. Golshani
  Status:   Published
  Journal: Phys. Lett. A
  No.:  52
  Vol.:  313
  Year:  2003
  Pages:   261-266
  Supported by:  IPM
  Abstract:
We have presented a theoretical extended version of dense coding protocol using entangled position state of two particles shared between two parties. A representation of Bell states and the required unitary operators are shown utilizing symmetric normalized Hadamard matrices. In addition, some explicit and conceivable forms for the unitary operators are presented by using some introduced basic operators. It is shown that, the proposed version is logarithmically efficient than some other multi-qubit dense coding protocols.

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