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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.
Ref.:
Aurélia Chenu, Mathieu Beau, Jianshu Cao, Adolfo del Campo, Phys. Rev. Lett. 118, 140403 (2017)
Zhenyu Xu, Luis Pedro García-Pintos, Aurélia Chenu, Adolfo del Campo, Phys. Rev. Lett. 122, 014103 (2019)
Adolfo del Campo is a Spanish physicist and distinguished research professor at the Donostia International Physics Center (DIPC. After completing his PhD at the University of Basque Country in 2008, he moved to the Institute for Mathematical Sciences at Imperial College London. In 2011, he was awarded a distinguished J. Robert Oppenheimer Fellowship to work at the Theoretical Division of Los Alamos National Laboratory. He was an Associate Professor of physics at the University of Massachusetts from 2014 to 2018 and moved to DIPC in 2019. His research focuses on nonequilibrium statistical mechanics and theoretical quantum physics. Del Campo has coedited a book on Time in Quantum Mechanics (Springer) and published over 100 peer-reviewed manuscripts. His works include seminal contributions to quantum control, topological defects and phase transitions, quantum speed limits. He copioneered the study of shortcuts to adiabaticity. Del Campo serves as a member of the Editorial Board of Scientific Reports.