The quantum cat map on the modular discretization of extremal black hole horizons

Abstract

Based on our recent work on the discretization of the radial AdS${}_2$ geometry of extremal BH horizons,we present a toy model for the chaotic unitary evolution of infalling single particle wave packets. We construct explicitly the eigenstates and eigenvalues for the single particle dynamics for an observer falling into the BH horizon, with time evolution operator the quantum Arnol'd cat map (QACM). Using these results we investigate the validity of the eigenstate thermalization hypothesis (ETH), as well as that of the fast scrambling time bound (STB). We find that the QACM, while possessing a linear spectrum, has eigenstates, which are random and satisfy the assumptions of the ETH. We also find that the thermalization of infalling wave packets in this particular model is exponentially fast, thereby saturating the STB, under the constraint that the finite dimension of the single--particle Hilbert space takes values in the set of Fibonacci integers.

28 pages LaTeX2e, 8 jpeg figures. Clarified certain issues pertaining to the relation between mixing time and scrambling time; enhanced discussion of the Eigenstate Thermalization Hypothesis; revised figures and updated references. Typos corrected

References in corpus (18)

• Black holes as mirrors: quantum information in random subsystems
• Complexity and Shock Wave Geometries
• An Investigation of AdS${}_2$ Backreaction and Holography
• On entanglement spreading in chaotic systems
• Near Extremal Black Hole Entropy as Entanglement Entropy via AdS2/CFT1
• Quantum Complexity and Negative Curvature
• Lectures on Quantum Black Holes
• Chaos in the black hole S-matrix
• Infrared quantum information
• A toy model of black hole complementarity
• The Quantum Black Hole as a Hydrogen Atom: Microstates Without Strings Attached
• Tensor networks, $p$-adic fields, and algebraic curves: arithmetic and the AdS${}_3$/CFT${}_2$ correspondence
• Unitarity, ergodicity, and quantum thermodynamics
• Supersymmetric Many-Body Systems from Partial Symmetries: Integrability, Localization and Scrambling
• Longitudinal nonlocality in the string S-matrix
• $W_{\infty }$ Algebras, Hawking Radiation and Information Retention by Stringy Black Holes
• Matrix Thermalization
• Chaotic Information Processing by Extremal Black Holes

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• On Complexity of Holographic Flavors
• Symmetry Properties of Quantum Dynamical Entropy
• Arnol'd cat map lattices
• Recent developments in the holographic description of quantum chaos