Quantum state transfer in arrays of flux qubits

Details Quantum state transfer in arrays of flux qubits Quantum state transfer in arrays of flux qubits

2005-09-19

arxiv.org/abs/cond-mat/0509478v1

New J. Phys. 7, 181 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 8 figures

Scientific paper

10.1088/1367-2630/7/1/181

In this work, we describe a possible experimental realization of Bose's idea to use spin chains for short distance quantum communication [S. Bose, {\it Phys. Rev. Lett.} {\bf 91} 207901]. Josephson arrays have been proposed and analyzed as transmission channels for systems of superconducting charge qubits. Here, we consider a chain of persistent current qubits, that is appropriate for state transfer with high fidelity in systems containing flux qubits. We calculate the fidelity of state transfer for this system. In general, the Hamiltonian of this system is not of XXZ-type, and we analyze the magnitude and the effect of the terms that don't conserve the z-component of the total spin.

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