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Phys. Rev. Lett. 79, 2371–2374 (1997)

Quantum Manipulations of Small Josephson Junctions

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Alexander Shnirman1,2, Gerd Schön1, and Ziv Hermon1
1Institut für Theoretische Festkörperphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany
2School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel

Received 6 June 1997; published in the issue dated 22 September 1997

Low-capacitance Josephson junction arrays in the parameter range where single charges can be controlled are suggested as possible physical realizations of the elements which have been considered in the context of quantum computers. We discuss single and multiple quantum-bit systems. The systems are controlled by applied gate voltages, which also allow the necessary manipulation of the quantum states. We estimate that the phase-coherence time is sufficiently long for experimental demonstration of the principles of quantum computation.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.2371
DOI:
10.1103/PhysRevLett.79.2371
PACS:
85.25.Cp, 03.65.Sq, 73.23.-b