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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics II

Q 31.42: Poster

Dienstag, 24. März 2015, 17:00–19:00, C/Foyer

Multi-Mode Tavis-Cummings Model with Time-Delayed Feedback Control — •Wassilij Kopylov¹, Tobias Brandes¹, Milan Radonjić², Antun Balaž³, and Axel Pelster⁴ — ¹Institute for Theoretical Physics, Technische Univesität Berlin, Germany — ²Photonics Center, Institute of Physics Belgrade, University of Belgrade, Serbia — ³Scientific Computing Laboratory, Institute of Physics Belgrade, University of Belgrade, Serbia — ⁴Physics Department and Research Center OPTIMAS, Technische Universität Kaiserslautern, Germany

We study a multi-mode Tavis-Cummings model [1] which reveals a complex phase diagram with multiple stable stationary states at mean-field level. Adding a time-delayed Pyragas feedback control term [2,3] in the equations of motion allows to tune the stability of the stationary states and, thus, modifies the underlying phase diagram. In addition, we analyze in detail how an external heat bath for the atoms changes the system dynamics both without and with time-delayed feedback control.

[1] M. Tavis and F.W. Cummings, Phys. Rev. 170, 379 (1968)

[2] K. Pyragas, Phys. Lett. A 170, 421 (1992)

[3] W. Just, A. Pelster, M. Schanz, and E. Schöll, Phil. Trans. Roy. Soc. A 368, 303 (2010)