Conditioning two-party quantum teleportation within a three-party quantum channel

Abstract

We consider an arbitrary continuous-variable three-party Gaussian quantum state which is used to perform quantum teleportation of a pure Gaussian state between two of the parties (Alice and Bob). In turn, the third party (Charlie) can condition the process by means of local operations and classical communication. We find the best measurement that Charlie can implement on his own mode that preserves the Gaussian character of the three-mode state and optimizes the teleportation fidelity between Alice and Bob.

14 pages, 7 figures. Eqs. (4),(9),(A11) and (A14) revised. Conclusion modified

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Cited by in corpus (13)

• Gaussian Quantum Information
• Advances in Quantum Teleportation
• Macroscopic Entanglement by Entanglement Swapping
• Correlation Matrices of Two-Mode Bosonic Systems
• Quantum Teleportation with Continuous Variables: a survey
• Quantum teleportation scheme by selecting one of multiple output ports
• Equivalence between Entanglement and the Optimal Fidelity of Continuous Variable Teleportation
• Optical state engineering, quantum communication, and robustness of entanglement promiscuity in three-mode Gaussian states
• A limit formula for the quantum fidelity
• Quantum reading under a local energy constraint
• Continuous-Variable Quantum State Transfer with Partially Disembodied Transport
• The classical capacity for continuous variable teleportation channel
• Quantum information transfer using weak measurements and any non-product resource state