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Philos Trans A Math Phys Eng Sci. 2003 Jul 15;361(1808):1323-38.

Scalable solid-state qubits: challenging decoherence and read-out.

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  • 1Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, 41296 Göteborg, Sweden.

Abstract

We review some basic facts about qubits and qubit processing. After a brief survey of solid-state qubits, we focus on quantized electrical circuits and superconducting qubits based on Josephson junctions. We review the general framework and indicate how the various qubits, such as the superconducting Cooper pair box charge qubit, the persistent current flux qubit, the hybrid charge-phase qubit, and the Andreev-level qubit, can be seen to appear due to different choices of design parameters. Finally, we consider multi-qubit systems and discuss some aspects of decoherence.

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