Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/4649
Title: Signature of Chaos in Perturbed Quantum Wells
Authors: Das, Pranaya Pratik
Ganguli, Biplab
Keywords: Symmetry breaking
OTOC
Loschmidt Echo
IHO
Chaos
Quantum Chaos
Issue Date: Jul-2024
Citation: International Conference on 60 Years of DFT: Advancements in Theory & Computation, IIT Mandi, India, 21-26 July 2024
Abstract: Previous studies have concluded that Out-of-Time-Order-Correlator (OTOC) shows exponential growth in the neighbourhood of a local maximum. If this statement holds true, the exponential growth should break off once the local maximum is no longer present within the system. By applying a small symmetry-breaking perturbation, we notice that the behaviour of the OTOCs remains remarkably resilient even in the absence of a maximum. Besides this, we also notice that with the increase in perturbation strength, the broken symmetric region expands, causing a broader range of eigenstates to engage in the exponential growth of OTOCs. Therefore, the critical factor lies not in the presence of a local maximum, but in the dynamic nature of the density of states in the broken symmetry regions. Our examination, spanning diverse potential landscapes, reveals the universality of this phenomenon. We also use other chaos diagnostic tool, Loschmidt Echo (LE). Interestingly, they also show signature of chaos whenever there is an exponential growth of OTOC.
Description: Copyright belongs to proceeding publisher
URI: http://hdl.handle.net/2080/4649
Appears in Collections:Conference Papers

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