Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 27: Symposium: Circuit QED
TT 27.6: Vortrag
Donnerstag, 28. Februar 2008, 12:00–12:15, H 0104
Strong squeezing in a solid state system — •Michael Marthaler1, Alexander Shnirman2, and Gerd Schön1 — 1Institut für Theoretische Festkörperphysik and DFG-Center for Functional Nanostructures (CFN), Universität Karlsruhe, D-76128, Germany — 2Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria
A Superconducting Single Electron Transistor (SSET) coupled to an anharmonic oscillator can be used to create a strongly squeezed distribution of photon number states. The transitions caused by quasiparticle tunneling in the SSET have a sharp cut-off, resulting from the vanishing density of states inside the gap. This creates a strong nonlinearity in the rates which increase the number of photons in the oscillator. If the dissipation in the oscillator is low we produce a nearly pure Fock state.