Causality in quantum teleportation: information extraction and noise effects in entanglement distribution

Abstract

Quantum teleportation is possible because entanglement allows a definition of precise correlations between the non-commuting properties of a local system and corresponding non-commuting properties of a remote system. In this paper, the exact causality achieved by maximal entanglement is analyzed and the results are applied to the transfer of effects acting on the entanglement distribution channels to the teleported output state. In particular, it is shown how measurements performed on the entangled system distributed to the sender provide information on the teleported state while transferring the corresponding back-action to the teleported quantum state.

14 pages, including three figures, discussion of fidelity added

References in corpus (2)

• Experimental quantum teleportation
• Teleportation as a Depolarizing Quantum Channel, Relative Entropy and Classical Capacity

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• An investigation of the transfer dynamics of quantum teleportation by weak measurement statistics
• What does the operator algebra of quantum statistics tell us about the objective causes of observable effects?