Dresden 2026 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 42: Poster: Quantum Dynamics and Many-body Systems (joint session DY/TT)
DY 42.1: Poster
Mittwoch, 11. März 2026, 15:00–18:00, P5
Operator spreading through the lens of the information lattice — •Luca Gawalleck1,2, Maxime Debertolis1, Jens H. Bardarson3, and David J. Luitz1 — 1Institut of Physics, University of Bonn, Nußallee 12, 53115 Bonn, Germany — 2Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany — 3Department of Physics, KTH Royal Insititute of Technology, Stockholm, 106 91 Sweden
We study the entanglement growth during Heisenberg time evolution by extending the framework of the information lattice to operators using the operator entanglement entropy. We focus on one-dimensional quantum spin chains and work in the tensor network formalism. The generalization of the information lattice to matrix product operators allows us to observe the spreading of initially local operators in a way that is not biased by the choice of a probing operator. We demonstrate that the operator information lattice we introduce contains all information typically provided by the out-of-time-order correlator with the additional ability to resolve the correlations on different scales. This method provides a good way to analyze systematically the time dependence of entanglement and can seamlessly be integrated into existing information-lattice-based algorithms.
Keywords: entanglement entropy; matrix product operator; information lattice; heisenberg time evolution; information spreading