Abstract
In this article, using the principles of Random Matrix Theory (RMT) with Gaussian Unitary Ensemble (GUE), we give a measure of quantum chaos by quantifying Spectral From Factor (SFF) appearing from the computation of two point Out of Time Order Correlation function (OTOC) expressed in terms of square of the commutator bracket of quantum operators which are separated in time scale. We also provide a strict model independent bound on the measure of quantum chaos, −1/N (1 − 1/π) ≤ SFF ≤ 0 and 0 ≤ SFF ≤ 1/πN, valid for thermal systems with large and small number of degrees of freedom respectively. We have studied both the early and late behaviour of SFF to check the validity and applicability of our derived bound. Based on the appropriate physical arguments we give a precise mathematical derivation to establish this alternative strict bound of quantum chaos. Finally, we provide an example of integrability from GUE based RMT from Toda Lattice model to explicitly show the application of our derived bound on SFF to quantify chaos.
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ArXiv ePrint: 1811.01079
This project is the part of the non-profit virtual international research consortium “Quantum Structures of the Space-Time & Matter”. (Sayantan Choudhury)
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Choudhury, S., Mukherjee, A. A bound on quantum chaos from Random Matrix Theory with Gaussian Unitary Ensemble. J. High Energ. Phys. 2019, 149 (2019). https://doi.org/10.1007/JHEP05(2019)149
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DOI: https://doi.org/10.1007/JHEP05(2019)149