Optimal quantum cloning via spin networks

Abstract

In this paper we present an approach to quantum cloning via free dynamical evolution of spin networks. By properly designing the network and the couplings between spins, we show that optimal 1->M phase covariant cloning can be achieved without any external control. Especially, when M is an odd number, the optimal phase-covariant cloning can be achieved without ancillas. Moreover, we demonstrate that the same framework is capable for optimal 1->2 universal cloning.

4 pages, 1 figure

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Cited by in corpus (11)

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• A photonic Carnot engine powered by a quantum spin-star network
• Information-flux approach to multiple-spin dynamics
• Factorization and criticality in finite XXZ systems of arbitrary spin
• Spin Star as Switch for Quantum Networks
• Optimal 1->M universal quantum cloning via spin networks
• Information transfer rates in spin quantum channels
• Co-Processors for Quantum Devices
• Fusing Imperfect Photonic Cluster States
• Storing Small Photonic Cluster States in a Dephasing Environment
• Imperfect Construction of Microclusters