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SUMMARY:RTG seminar:Prof. Dr. Götz Uhrig
DESCRIPTION:Concepts and applications in non-equilibrium physics \n\n\n\n \n\n\n\nTU Dortmund \n\n\n\n \n\n\n\nNon-equilibrium physics has become one of the thriving focal points in condensed matter physics. Pump-probe experiments are by now fairly common and further driving protocols attract more and more attention. We will discuss how periodic driving allows to cool a small quantum system by exploiting the commensurability of various oscillatory processes [1]. Interestingly\, the Lindblad damping of a highly excited state is crucial here. Turning to ordered magnetic systems\, it is common to describe their damping by Landau-Lifshitz-Gilbert equations. The question arises whether this phenomenological formalism is related to Lindblad damping. We will present such a conceptual link [2]. Finally\, we explicity consider how one can switch magnetic order efficiently by electromagnetic pulses. How strong do the pulses have to be [3]? What is the influence of relaxation? These question are relevant for processing data in magnetic storage devices. \n\n\n\n[1] Quantum coherence from commensurate driving with laser pulses and decay G.S. Uhrig; SciPost Phys. 8\, 040 (2020)[2] Landau-Lifshitz damping from Lindbladian dissipation in quantum magnets G.S. Uhrig; arXiv:2406.10613[3] Exchange enhanced switching by alternating fields in quantum antiferromagnets A. Khudoyberdiev\, G.S. Uhrig; Phys. Rev. B 111\, 064408 (2025) \n\n\n\nVenue: PHY 5.0.21
URL:https://grk2905.de/event/grk-seminarprof-dr-gotz-uhrig/
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2025/04/uhrig_goetz_2024_10-scaled-e1744278379321.jpg
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