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Real-time observation of discrete Andreev tunneling events
V. F. Maisi, O. -P. Saira, Yu. A. Pashkin +3
We provide a direct proof of two-electron Andreev transitions in a superconductor - normal metal tunnel junction by detecting them in a real-time electron counting experiment. Our…
Charge transport through ultrasmall single and double Josephson junctions coupled to resonant modes of the electromagnetic environment
Yu. A. Pashkin, H. Im, J. Leppäkangas +5
We have investigated charge transport in ultrasmall superconducting single and double Josephson junctions coupled to resonant modes of the electromagnetic environment. We observe p…
Ultimate on-chip quantum amplifier
O. Astafiev, A. A. Abdumalikov, A. M. Zagoskin +3
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…
Detection of mechanical resonance of a single-electron transistor by direct current
Yu. A. Pashkin, T. F. Li, J. P. Pekola +6
We have suspended an Al based single-electron transistor whose island can resonate freely between the source and drain leads forming the clamps. In addition to the regular side gat…
Electromagnetically induced transparency on a single artificial atom
A. A. Abdumalikov, O. Astafiev, A. M. Zagoskin +3
We present experimental observation of electromagnetically induced transparency (EIT) on a single macroscopic artificial "atom" (superconducting quantum system) coupled to open 1D…
Resonance Fluorescence of a Single Artificial Atom
O. Astafiev, A. M. Zagoskin, A. A. Abdumalikov +5
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…