Single artificial-atom lasing

O. Astafiev (), K. Inomata, A. O. Niskanen, T. Yamamoto, Yu. A. Pashkin, Y. Nakamura and J. S. Tsai
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O. Astafiev: NEC Nano Electronics Research Laboratories, Tsukuba, Ibaraki 305-8501, Japan
K. Inomata: The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan
A. O. Niskanen: CREST-JST, Kawaguchi, Saitama 332-0012, Japan
T. Yamamoto: NEC Nano Electronics Research Laboratories, Tsukuba, Ibaraki 305-8501, Japan
Yu. A. Pashkin: NEC Nano Electronics Research Laboratories, Tsukuba, Ibaraki 305-8501, Japan
Y. Nakamura: NEC Nano Electronics Research Laboratories, Tsukuba, Ibaraki 305-8501, Japan
J. S. Tsai: NEC Nano Electronics Research Laboratories, Tsukuba, Ibaraki 305-8501, Japan

Nature, 2007, vol. 449, issue 7162, 588-590

Abstract: A lasing effect with a single artificial atom (a Josephson-junction charge qubit) that is embedded in a superconducting resonator is demonstrated, making use of the property that such artificial atoms are strongly and controllably coupled to resonator modes. The device is essentially different from existing lasers and masers; one and the same artificial atom excited by current injection produces many photons.

Date: 2007
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DOI: 10.1038/nature06141

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