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TT: Fachverband Tiefe Temperaturen
TT 87: Many-body Quantum Dynamics II (joint session DY/TT)
TT 87.6: Vortrag
Donnerstag, 12. März 2026, 16:15–16:30, HÜL/S186
Enhancing efficiency of local-information time evolution — •Moksh Bhateja1, Jonas Rigo2, and Markus Schmitt2,3 — 1Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — 2Universität Regensburg, Regensburg, Germany — 3PGI-8: Forschungszentrum Jülich, Jülich, Germany
The time evolution of an initially unentangled system under the von Neumann equation generally leads to rapid entanglement growth. This poses challenges for numerical tractability. The Information Lattice framework addresses this by systematically discarding accumulated non-local information (i.e., entanglement) to maintain computational feasibility. Within the local-information time evolution (LITE) approach, we propose Rényi-2 entropy as a measure of information, eliminating the need for matrix decomposition. When combined with additional approximations, this approach significantly enhances the efficiency and scalability of simulations in terms of both system size and duration of time evolution. We demonstrate the accuracy of this method by computing high-quality diffusion coefficients and local observables for a large non-integrable system.
Keywords: Information Lattice; Entanglement Growth; Non-Integrable Quantum Systems; Local-Information Time Evolution (LITE); Rényi-2 Entropy