Quantum Optics with Superconducting Artificial Atom
I.-C. Hoi1*, P. Y. Wen1, J. C. Chen1, A. F. Kockum2, L. Tornberg3, A. Pourkabirian3, G. Johansson3, P. Delsing3, C. M. Wilson4
1Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
2Center for Emergent Matter Science, RIKEN, Saitama, Japan
3Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden
4Institute for Quantum Computing & Electrical and Computer Engineering Department, University of Waterloo, Waterloo, Canada
* Presenter:I.-C. Hoi
In this talk, I will address advances on quantum optics with superconducting artificial atom. In the first sets of experiments, we embed a transmon artificial atom at the end of a transmission line. When a weak coherent state is on resonance with the atom, we observe scattering field from the atom. We also study the power dependent and flux dependent of the atom. By applying a pump tone at transition frequency of ground state and first excited state, we observe the Mollow triplet. In the second sets of experiment, we embed a transmon at a distance from the end of a transmission line, which acts as a mirror. By tuning the wavelength of the atom, we effectively change the normalized distance between atom and mirror, allowing us to effectively move the atom from a node to an antinode of the vacuum fluctuations. We probe the strength of vacuum fluctuations by measuring spontaneous emission rate of the atom.

Keywords: superconducting artificial atom, transmon, Mollow triplet, vacuum fluctuations, spontaneous emission rate