Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Focus Session: Feedback Control of Nonlinear Soft and Hard Matter Systems (original: DY, joined by CPP)
CPP 12.5: Vortrag
Montag, 31. März 2014, 16:45–17:00, HÜL 186
Time-delayed feedback control of the Dicke-Hepp-Lieb superradiant quantum phase transition — •Wassilij Kopylov1, Clive Emary2, Eckehard Schöll1, and Tobias Brandes1 — 1Institut für Theoretische Physik, Technische Universität Berlin — 2Department of Physics and Mathematics, University of Hull, United Kingdom
We apply the time-delayed Pyragas control scheme to the dissipative Dicke system, modulating it by the difference of photon numbers emitted from the cavity. Using the mean field approach and linear stability analysis we show that this control dramatically affects the states in the primary superradiant regime, creating new limit cycle phases and a rich phase diagram. We also derive an analytical transcendental equation for the boundaries between the different zones in the phase diagram.