Hot wormholes and chaos dynamics in a two-coupled SYK model
Year: 2025
Type: article
Abstract: A bstract We study the dynamics of chaos across the phase transition in a 2-coupled Sachdev-Ye-Kitaev (SYK) model, with a focus on the unstable “hot wormhole” phase. Using the Schwinger-Keldysh formalism, we employ two non-equilibrium protocols that allow access to this phase, which is inaccessible through equilibrium simulations: one involves cooling the system via a coupling to a thermal bath, while in the other we periodically drive the coupling parameter between the two sides. We numerically compute the Lyapunov exponents of the hot wormhole for the two cases. Our results uncover a rich structure within this phase, including both thermal and non-thermal solutions. These behaviors are analyzed in detail, with partial insights provided by the Schwarzian approximation, which captures certain but not all aspects of the observed dynamics.
Source: Journal of High Energy Physics
Institution: Universidade de Santiago de Compostela
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G1063260992, G1067135717, G1086978037, G1138254609, G121809054, G1496055848, G1622782223, G1840991089, G1855990336, G1945318897, G2262748287, G2309174360, G2660406951, G3480869486, G3681454997, G3694284866, G4042783231, G425668148, G451917667, G4681468125, G486686200, G5080475149, G5421974903, G5805502524, G5967599077, G7084143925, G897484643
OpenAlex ID: W4408428310