Optimal 1->M universal quantum cloning via spin networks

Details Optimal 1->M universal quantum cloning via spin networks Optimal 1->M universal quantum cloning via spin networks

2007-05-18

arxiv.org/abs/0705.2694v1

PHYSICAL REVIEW A 76, 034302 (2007)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.76.034302

We present a scheme that transform 1 qubit to M identical copies with optimal fidedelity via free dynamical evolution of spin star networks. We show that the Heisenberg XXZ coupling can fulfill the challenge. The initial state of the copying machine and the parameters of the spin Hamiltonian are discussed in detail. Furthermore we have proposed a feasible method to prepare the initial state of the copying machine.

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