Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 6: Ultracold atoms, ions and BEC I (with A)
Q 6.2: Vortrag
Montag, 17. März 2014, 10:45–11:00, BEBEL E34
Generalised Dicke non-equilibrium dynamics in trapped ions — •Sam Genway1, Weibin Li1, Cenap Ates1, Benjamin Lanyon2,3, and Igor Lesanovsky1 — 1School of Physics and Astronomy, University of Nottingham, United Kingdom — 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Innsbruck, Austria — 3Institut für Experimentalphysik, Universität Innsbruck, Austria
We explore trapped ions as a setting to investigate non-equilibrium phases in a generalised Dicke Model of dissipative spins coupled to phonon modes. We find a rich dynamical phase diagram as a function of the spin-phonon coupling and dissipation strength, which includes superradiant-like regimes, dynamical phase-coexistence and phonon-lasing behaviour. A particular advantage of the trapped-ion set-up is that these dynamical phases, and the transitions between them, can be probed in situ via fluorescence measurements. We introduce a minimal model that captures the main physical insights and consider an experimental realisation with Ca+ ions trapped in a linear Paul trap with a dressing scheme to create effective two-level systems with a tunable dissipation rate [1].
[1] S. Genway, W. Li, C. Ates, B. P. Lanyon and I. Lesanovsky. arXiv:1308.1424 (To appear in Phys. Rev. Lett.)