Berlin 2005 – scientific programme

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TT: Tiefe Temperaturen

TT 8: Posters Transport

TT 8.43: Poster

Friday, March 4, 2005, 14:00–18:00, Poster TU C

Quantum state transfer in arrays of flux qubits — •Andriy Lyakhov and Christoph Bruder — Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland

In this work, we describe a possible experimental realisation of Bose’s idea to use spin chains for short distance quantum communication [1]. Josephson arrays have been proposed and analyzed as transmission channels for systems of superconducting charge qubits [2]. Here, we consider a chain of persistent current qubits [3], 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 XY-type, and we analyze the magnitude and the effect of the terms that break XY-symmtry.

[1] S. Bose, Phys. Rev. Lett. 91, 207901 (2003).

[2] A. Romito, R. Fazio, and C. Bruder, quant-ph/0408057.

[3] L.S. Levitov et al., cond-mat/0108266.