Optimal conclusive teleportation of quantum states

Details Optimal conclusive teleportation of quantum states Optimal conclusive teleportation of quantum states

2003-03-31

arxiv.org/abs/quant-ph/0304002v1

Phys. Rev. A 68, 022310 (2003).

Physics

Quantum Physics

8 pages, revtex, no figures

Scientific paper

10.1103/PhysRevA.68.022310

Quantum teleportation of qudits is revisited. In particular, we analyze the case where the quantum channel corresponds to a non-maximally entangled state and show that the success of the protocol is directly related to the problem of distinguishing non-orthogonal quantum states. The teleportation channel can be seen as a coherent superposition of two channels, one of them being a maximally entangled state thus, leading to perfect teleportation and the other, corresponding to a non-maximally entangled state living in a subspace of the d-dimensional Hilbert space. The second channel leads to a teleported state with reduced fidelity. We calculate the average fidelity of the process and show its optimality.

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