Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 5: Transport: Quantum Coherence and Quantum Information Systems 1 (jointly with MA and HL)
TT 5.8: Vortrag
Montag, 26. März 2012, 11:30–11:45, BH 243
Lasing, trapping states, and multistability in circuit quantum electrodynamical analog of a single-atom injection maser — •Michael Marthaler1, Juha Leppäkangas1,2, and Jared Cole1,3 — 1Institut für Theoretische Festkörperphysik and DFG Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany — 2Applied Quantum Physics Laboratory, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden — 3Chemical and Quantum Physics, School of Applied Sciences, RMIT University, Melbourne 3001, Australia
We study a superconducting single-electron transistor (SSET) which is coupled to a LC oscillator via the phase difference across one of the Josephson junctions. This leads to a strongly anharmonic coupling between the SSET and the oscillator. The coupling can oscillate with the number of photons, which makes this system very similar to the single-atom injection maser. However, the advantage of a design based on superconducting circuits is the strong coupling and existence of standard methods to measure the radiation field in the oscillator. This makes it possible to study many effects that have been predicted for the single-atom injection maser in a circuit quantum electrodynamics setup.