Speaker
Congwu Wang
(Ruhr University Bochum/Fudan Univ.)
Description
We introduce a novel method that utilizes the overlaps between test states and Hamiltonian eigenstates to determine resonance positions, applicable both in lattice and in finite-volume continuum calculations. We demonstrate the efficiency of this method through explicit examples. Using simple spatially compact test states, we obtained Breit-Wigner peaks in the energy distribution for the overlaps (which we call the “spectral overlap function”) as anticipated. The extrapolated resonance positions in the infinite-volume and continuum limit compare well with the exact values. The Monte-Carlo version of this technique for nuclear lattice EFT is currently under development.
Primary authors
Congwu Wang
(Ruhr University Bochum/Fudan Univ.)
Dean Lee
(Michigan State University)
Evgeny Epelbaum
(Ruhr University Bochum)
Hermann Krebs
(Ruhr University Bochum)
Lukas Bovermann
(Ruhr University Bochum)
