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Teleportation and dense coding with genuine multipartite entanglement.

Ye Yeo1, Wee Kang Chua

  • 1Department of Physics, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore.

Physical Review Letters
|April 12, 2006
PubMed
Summary

We developed a protocol for quantum teleportation using a novel four-qubit entangled state. This state, distinct from Bell states, enables faithful two-qubit state transfer and dense coding, suggesting its potential as a genuine four-partite entanglement resource.

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Area of Science:

  • Quantum Information Science
  • Quantum Entanglement
  • Quantum Communication

Background:

  • Quantum entanglement is a fundamental resource for quantum information processing.
  • Multipartite entangled states are crucial for advanced quantum protocols.
  • Existing multipartite states like GHZ and W states have unique properties.

Purpose of the Study:

  • To introduce a novel protocol (E0) for quantum teleportation.
  • To present a genuine four-qubit entangled state.
  • To explore its applications in dense coding (D0).

Main Methods:

  • Construction of a specific four-qubit entangled state.
  • Development of an explicit quantum teleportation protocol (E0).
  • Analysis of the state's properties and comparison with GHZ and W states.

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  • Formulation of a dense coding scheme (D0).

    • Main Results:

    • A protocol E0 for faithful two-qubit state teleportation using a genuine four-qubit entangled state.
    • The proposed four-partite state is not reducible to Bell state pairs.
    • Demonstration of a dense coding scheme D0 utilizing this state.
    • The state exhibits properties analogous to a Bell state for four parties.

    Conclusions:

    • The novel four-qubit entangled state is a promising resource for quantum communication.
    • The state serves as a genuine four-partite analogue to a Bell state.
    • The developed protocol E0 and scheme D0 highlight the state's utility.