Quantum partial teleportation as optimal cloning at a distance

Abstract

We propose a feasible scheme of conditional quantum partial teleportation of a qubit as optimal asymmetric cloning at a distance. In this scheme, Alice preserves one imperfect clone whereas other clone is teleported to Bob. Fidelities of the clones can be simply controlled by an asymmetry in Bell-state measurement. The optimality means that tightest inequality for the fidelities in the asymmetric cloning is saturated. Further we design a conditional teleportation as symmetric optimal N-> N+1 cloning from N Alice's replicas on single distant clone. We shortly discussed two feasible experimental implementations, first one for teleportation of polarization state of a photon and second one, for teleportation of a time-bin qubit.

5 pages, 3 figures

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• Optimal multicopy asymmetric Gaussian cloning of coherent states
• Quantum cloning a pair of orthogonally polarized photons with linear optics
• Partial teleportation of entangled atomic states
• Compensating for Beamsplitter Asymmetries in Quantum Interference Experiments
• Experimental demonstration of optimal universal asymmetric quantum cloning of polarization states of single photons by partial symmetrization
• Projecting onto any two-photon polarization state using linear optics
• An investigation of the transfer dynamics of quantum teleportation by weak measurement statistics
• Temperature effects on quantum cloning of states and entanglement
• State transfer with quantum side information