Journal
SCIENCE
Volume 327, Issue 5967, Pages 840-843Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1181918
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Funding
- Core Research for Evolutional Science and Technology, Japan Science and Technology Agency
- Ministry of Education, Culture, Sports, Science and Technology
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An atom in open space can be detected by means of resonant absorption and reemission of electromagnetic waves, known as resonance fluorescence, which is a fundamental phenomenon of quantum optics. We report on the observation of scattering of propagating waves by a single artificial atom. The behavior of the artificial atom, a superconducting macroscopic two-level system, is in a quantitative agreement with the predictions of quantum optics for a pointlike scatterer interacting with the electromagnetic field in one-dimensional open space. The strong atom-field interaction as revealed in a high degree of extinction of propagating waves will allow applications of controllable artificial atoms in quantum optics and photonics.
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