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DY: Fachverband Dynamik und Statistische Physik

DY 47: Statistical Physics: General I

DY 47.9: Vortrag

Donnerstag, 12. März 2026, 11:45–12:00, ZEU/0114

Quantification of correlations by Fisher matrix — •Jakub Grabarczyk and Krzysztof Byczuk — Faculty of Physics, University of Warsaw, Poland

Quantum Fisher Information (QFI) is a concept based on relative entropy used to measure the distinctiveness of the given statistical ensemble. When applied to a lattice model, it quantifies the measurable difference between two instances of the model characterized by different parameter values. In my work, I demonstrate the significance of QFI in understanding microscopic properties of correlated quantum particles. The results are verified numerically. I compare the QFI across several important lattice models including the bosonic and fermionic Hubbard models as well as the Heisenberg model. Furthermore, I discuss how QFI relates to physically measurable quantities.