Periodically Driven Sachdev-Ye-Kitaev Models

Clemens Kuhlenkamp; Michael Knap

Periodically Driven Sachdev-Ye-Kitaev Models

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arxiv 1906.06341 v2 pith:E4KEG33Z submitted 2019-06-14 cond-mat.str-el cond-mat.quant-gascond-mat.stat-mech

Clemens Kuhlenkamp , Michael Knap This is my paper · ORCID

classification cond-mat.str-elcond-mat.quant-gascond-mat.stat-mech

keywords dynamicsheatingdrivenheavyliquidperiodicallyphasesquantum

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Periodically driven quantum matter can realize exotic dynamical phases. In order to understand how ubiquitous and robust these phases are, it is pertinent to investigate the heating dynamics of generic interacting quantum systems. Here we study the thermalization in a periodically-driven generalized Sachdev-Ye-Kitaev (SYK)-model, which realizes a crossover from a heavy Fermi liquid (FL) to a non-Fermi liquid (NFL) at a tunable energy scale. Developing an exact field theoretic approach, we determine two distinct regimes in the heating dynamics. While the NFL heats exponentially and thermalizes rapidly, we report that the presence of quasi-particles in the heavy FL obstructs heating and thermalization over comparatively long time scales. Prethermal high-frequency dynamics and possible experimental realizations of non-equilibrium SYK physics are discussed as well.

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Hot wormholes and chaos dynamics in a two-coupled SYK model
hep-th 2025-01 conditional novelty 6.0 of 10

First numerical Lyapunov exponents for the unstable hot wormhole phase of the two-coupled SYK model, obtained via cooling and periodic-driving protocols.

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