Berlin 2024 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 31: Decoherence and Open Quantum Systems
QI 31.4: Vortrag
Freitag, 22. März 2024, 10:15–10:30, HFT-FT 101
Systematic coarse-graining of environments for the non-perturbative simulation of open quantum systems — •Nicola Lorenzoni1, Namgee Cho1, James Lim1, Dario Tamascelli1,2, Susana F. Huelga1, and Martin B. Plenio1 — 1Institut für Theoretische Physik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89081 Ulm, Germany — 2Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, Via Celoria 16, 20133 Milano-Italy
Conducting precise electronic-vibrational dynamics simulations of molecular systems poses significant challenges when dealing with an environment composed of numerous vibrational modes. Here, we introduce novel techniques for the construction of effective phonon spectral densities that capture accurately open system dynamics over a finite time interval of interest. When combined with existing non-perturbative simulation tools, our approach can reduce significantly the computational costs associated with many-body open system dynamics.
Keywords: Numerical Methods; Non-perturbative simulation; Tensor Networks; Effective environments