Accuracy of the finite-temperature Lanczos method compared to simple typicality-based estimates
Year: 2020
Type: article
Abstract: The authors investigate approximations of the partition function that can be used for large systems where an exact evaluation is impossible. These methods rest on the observation that traces can be replaced by expectation values with respect to a single random vector for not too small temperatures. At low temperatures, where single vectors produce strongly fluctuating approximations, a proper average over many random vectors yields quasi exact results.
Source: Physical Review Research
Authors: Jürgen Schnack, Johannes Richter, Robin Steinigeweg
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Awards: Nichtgleichgewichtsdynamik in 2D Clustern aus der
Perspektive von Quantentypikalität und Eigenzustandsthermalisierung, FOR 2692: Fundamental Aspects of Statistical Mechanics and the Emergence of Thermodynamics in NonEquilibrium Systems, Dekohärenz und Relaxation in Quantenspinclustern, G5375917667, G5383370051, G5503894889, G62979356, G8007648389, Molekulare Magnetokalorik
OpenAlex ID: W2990911262