Unquenched—a memoir on non-equilibrium dynamics of quantum many-body systems: honoring Amit Dutta

Shraddha Sharma (), Tanay Nag, Atanu Rajak, Souvik Bandyopadhyay, Sourav Bhattacharjee, Somnath Maity and Utso Bhattacharya
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Shraddha Sharma: National Institute of Technology Rourkela
Tanay Nag: BITS Pilani-Hyderabad Campus
Atanu Rajak: Indian Institute of Technology
Souvik Bandyopadhyay: Boston University
Sourav Bhattacharjee: The Barcelona Institute of Science and Technology
Somnath Maity: RIKEN Cluster for Pioneering Research (CPR)
Utso Bhattacharya: The Barcelona Institute of Science and Technology

The European Physical Journal B: Condensed Matter and Complex Systems, 2024, vol. 97, issue 7, 1-16

Abstract: Abstract This short review explores the physics journey of Professor Amit Dutta, illuminating his collaborative contributions with students and peers. We mainly focus on standard approaches to understanding non-equilibrium quantum dynamics and ground-state criticality using quantum informatic measures like ground-state fidelity, the Loschmidt echo and/or the decoherence factor. Using Floquet theory as a tool, we also discuss the dynamics of hard-core bosonic chain, shedding light on the phenomenon of dynamical localization and different analytically approachable limits of Floquet theory. The review further extends to probe the physics of topological phase transitions in driven/quenched systems, where we mainly focus on the non-equilibrium response of topological systems and topological state preparation. Finally, we also discuss late-time quantum dynamics leading to the thermalization of open and closed systems, where we review contemporary approaches to the applicability of thermodynamic principles in microscopic quantum systems and the macroscopic emergence of statistical mechanics in driven/quenched ergodic systems. Throughout this memoir, Professor Amit Dutta’s important scientific contributions are mentioned for their impact on advancing our understanding of quantum dynamics and statistical mechanics. Graphic abstract

Date: 2024
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DOI: 10.1140/epjb/s10051-024-00740-1

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