Optimal ancilla-free phase-covariant telecloning of qudits via nonmaximally entangled states

Details Optimal ancilla-free phase-covariant telecloning of qudits via nonmaximally entangled states Optimal ancilla-free phase-covariant telecloning of qudits via nonmaximally entangled states

2011-09-25

arxiv.org/abs/1109.5335v1

Physics

Quantum Physics

The improvement of Phys. Rev. A 79, 064306 (2009); see also Chin. Phys. Lett. 27, 100303 (2010)

Scientific paper

We study the one-to-two phase-covariant telecloning of a qudit without ancilla. We show that the fidelity of the two clones can reach that of the clones in the optimal ancilla-based one-to-two phase-covariant cloning and telecloning, i.e., the limitation of quantum mechanics. More interestingly, it is a nonmaximally entangled state rather than the maximally entangled state that can be used to realize such a telecloning task.

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