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Journal of Modern Optics

Scheme for implementing 1 → Msymmetric economical phase-covariant telecloning based on quantum logic network

Y. H. Zhou, Lei Wang

Published Feb 2, 2012• 1 citation
Publisher

Abstract

The quantum logic network to implement 1 → M symmetric economical phase-covariant telecloning is presented. The scheme includes two parts: the first part is used to create the telecloning channel and the second part to teleport the input state. The telecloning channel which works without ancilla is constructed by two kinds of elementary unitary transformations, single-qubit rotation and multiple-qubit controlled operation. The probability of success is 50%, which is the same with the scheme in [Meng, F.Y.; Zhu, A.D. J. Mod. Opt. 2009, 56, 1255–1259].

DOI
10.1080/09500340.2012.655791

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The quantum logic network to implement 1 → M symmetric economical phase-covariant telecloning is presented. The scheme includes two parts: the first part is used to create the telecloning channel and the second part to teleport the input state. The telecloning channel which works without ancilla is constructed by two kinds of elementary unitary transformations, single-qubit rotation and multiple-qubit controlled operation. The probability of success is 50%, which is the same with the scheme in [Meng, F.Y.; Zhu, A.D. J. Mod. Opt. 2009, 56, 1255–1259].
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We propose a scheme to implement 1 → M economical phase-covariant quantum cloning by using N three-level atoms nonresonantly interacting with a cavity assisted by a classical laser field. Using this interaction 1 → M telecloning is also implemented by applying the maximal entangled W state and partial entangled W state as the quantum channel, respectively. It is pointed out by analysing the fidelities and success probabilities that a relatively high fidelity and success probability can be obtained by choosing an appropriate channel in terms of the pre-known information of the input state.