Jens Bardarson: Quantum thermalisation on the information lattice
Time: Thu 2026-04-09 13.00
Location: Room 3418, Linstedtsvägen 25
Participating: Jens Bardarson (KTH)
Abstract: I will review the information lattice, which we recently introduced as a way to decompose information in a quantum state into local information in position. Using this decomposition allows both universal characterisation of many-body states as well as an informed construction of efficient numerical algorithms for time evolution of many-body states to long times, way beyond the entanglement barrier that limits the time range of matrix product state time evolution. We apply this to the problem of simulating thermalising quantum many-body system to long times such that diffusion emerges.
Refs.
[1] T Klein Kvorning, L Herviou, JH Bardarson, SciPost Physics 13, 080 (2022)
[2] Claudia Artiaco, Christoph Fleckenstein, David Aceituno Chávez, Thomas Klein Kvorning, Jens H Bardarson, PRX Quantum 5 (2), 020352 (2024)
[3] C Artiaco, T Klein Kvorning, D Aceituno Chávez, L Herviou, JH Bardarson, Physical Review Letters 134, 190401 (2025)
[4] NP Bauer, B Trauzettel, T Klein Kvorning, JH Bardarson, C Artiaco, Physical Review A 112 (2), 022221 (2025)