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DY: Fachverband Dynamik und Statistische Physik
DY 34: Nonlinear Dynamics, Synchronization and Chaos - Part II
DY 34.5: Vortrag
Mittwoch, 18. März 2015, 16:00–16:15, BH-N 128
Quantum synchronization of driven self-sustained oscillators — •Christoph Bruder1, Andreas Nunnenkamp1,2, and Stefan Walter1,3 — 1Department of Physics, University of Basel, Klingelbergstr. 82, CH-4056 Basel — 2Cavendish Laboratory, J J Thomson Avenue, Cambridge CB3 0HE — 3Institute for Theoretical Physics, Universität Erlangen-Nürnberg, Staudtstr. 7, D-91058 Erlangen
Synchronization is a universal phenomenon that is important both in fundamental studies and in technical applications. Here we study synchronization of two dissipatively coupled Van der Pol oscillators in the quantum regime and analyze synchronization in terms of frequency entrainment and frequency locking [1]. Due to quantum noise strict frequency locking is absent and is replaced by a crossover from weak to strong frequency entrainment. The differences to the behavior of one quantum Van der Pol oscillator subject to an external drive [2] are discussed. Moreover, a possible experimental realization of two coupled quantum Van der Pol oscillators in an optomechanical setting is described.
[1] S. Walter, A. Nunnenkamp, and C. Bruder, Ann. Phys. DOI: 10.1002/andp.201400144 (2014)
[2] S. Walter, A. Nunnenkamp, and C. Bruder, Phys. Rev. Lett. 112, 094102 (2014)