2 papers
hep-lat2025
The Truncated Hankel Correlator Method
Johann Ostmeyer, Carsten Urbach
We introduce a new method to approximate Euclidean correlation functions by exponential sums. The Truncated Hankel Correlator (THC) method builds a Hankel matrix from the full corr…
hep-lat2024
On the equivalence of Prony and Lanczos methods for Euclidean correlation functions
Johann Ostmeyer, Aniket Sen, Carsten Urbach
We investigate the oblique Lanczos method recently put forward in arXiv:2406.20009 for analysing Euclidean correlators in lattice field theories and show that it is analytically eq…