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- A. O. Niskanen
- CREST, Japan Science and Technology Institute, Kawaguchi, Saitama 332-0012, Japan.
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- K. Harrabi
- CREST, Japan Science and Technology Institute, Kawaguchi, Saitama 332-0012, Japan.
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- F. Yoshihara
- CREST, Japan Science and Technology Institute, Kawaguchi, Saitama 332-0012, Japan.
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- Y. Nakamura
- CREST, Japan Science and Technology Institute, Kawaguchi, Saitama 332-0012, Japan.
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- S. Lloyd
- CREST, Japan Science and Technology Institute, Kawaguchi, Saitama 332-0012, Japan.
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- J. S. Tsai
- CREST, Japan Science and Technology Institute, Kawaguchi, Saitama 332-0012, Japan.
説明
<jats:p>To do large-scale quantum information processing, it is necessary to control the interactions between individual qubits while retaining quantum coherence. To this end, superconducting circuits allow for a high degree of flexibility. We report on the time-domain tunable coupling of optimally biased superconducting flux qubits. By modulating the nonlinear inductance of an additional coupling element, we parametrically induced a two-qubit transition that was otherwise forbidden. We observed an on/off coupling ratio of 19 and were able to demonstrate a simple quantum protocol.</jats:p>
収録刊行物
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- Science
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Science 316 (5825), 723-726, 2007-05-04
American Association for the Advancement of Science (AAAS)
