Ultimate On-Chip Quantum Amplifier

Astafiev, O. V. and Abdumalikov, A. A. and Zagoskin, A. M. and Pashkin, Yuri and Nakamura, Y. and Tsai, J. S. (2010) Ultimate On-Chip Quantum Amplifier. Physical review letters, 104 (18). -. ISSN 0031-9007

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We report amplification of electromagnetic waves by a single artificial atom in open 1D space. Our three-level artificial atom-a superconducting quantum circuit-coupled to a transmission line presents an analog of a natural atom in open space. The system is the most fundamental quantum amplifier whose gain is limited by a spontaneous emission mechanism. The noise performance is determined by the quantum noise revealed in the spectrum of spontaneous emission, also characterized in our experiments.

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Journal Article
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Physical review letters
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28 Aug 2012 13:58
Last Modified:
19 Sep 2023 00:55