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Letter

Nature Physics 4, 523–526 (1 July 2008) | doi:10.1038/nphys972

Process tomography of quantum memory in a Josephson-phase qubit coupled to a two-level state

Matthew Neeley , M. Ansmann , Radoslaw C. Bialczak , M. Hofheinz , N. Katz , Erik Lucero , A. O|[rsquo]|Connell , H. Wang , A. N. Cleland & John M. Martinis

A quantum computer will require quantum bits (qubits) with good coherence that can be coupled together to form logic gates. Superconducting circuits offer a novel solution because qubits can be connected in elaborate ways through simple wiring, much like that of conventional integrated circuits.