Regensburg 2019 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 42: Focus: Many-Body Quantum Chaos
DY 42.2: Hauptvortrag
Donnerstag, 4. April 2019, 10:00–10:30, H20
Extreme Decoherence and Quantum Chaos — Zhenyu Xu1,2, Aurélia Chenu3,4, Luis Pedro García-Pintos2, Javier Molina-Vilaplana5, and •Adolfo Del Campo3,4 — 1School of Physical Science and Technology, Soochow University, Suzhou 215006, China — 2Department of Physics, University of Massachusetts, Boston, MA 02125, USA — 3Donostia International Physics Center, E-20018 San Sebastián, Spain — 4IKERBASQUE, Basque Foundation for Science, E-48013 Bilbao, Spain — 5Technical University of Cartagena, UPCT, 30202, Cartagena, Spain
We study the ultimate limits to the decoherence rate associated with dephasing processes. Fluctuating chaotic quantum systems are shown to exhibit extreme decoherence, with a rate that scales exponentially with the particle number, thus exceeding the polynomial dependence of systems with fluctuating k-body interactions. Our findings suggest the use of quantum chaotic systems as a natural test-bed for spontaneous wave function collapse models. We further discuss the implications on the decoherence of AdS/CFT black holes resulting from the unitarity loss associated with energy dephasing [1]. To conclude, we shall elucidate the connection between quantum work statistics, Loschmidt echo dynamics and information scrambling in chaotic quantum systems [2].
Bibliography:
[1] Zhenyu Xu, Luis Pedro García-Pintos, Aurélia Chenu, Adolfo del Campo, Phys. Rev. Lett. 122, 014103 (2019).
[2] Aurélia Chenu, Javier Molina-Vilaplana, Adolfo del Campo, arXiv:1804.09188 (2018).