Speaker
Lukas Bovermann
(Ruhr-Universität Bochum)
Description
We present a method to improve the lattice effective field theory description of the shape of atomic nuclei by applying unitary transformations to the Hamiltonian. The employed unitary operator is constructed as a reflection transformation from the original and the desired wave function. Similarly to a derivative expansion, it can be improved systematically so that one can tune the $\langle r^n \rangle$ expectation values order by order for the two-particle system. Moreover, the effects of the three-particle operators induced by the unitary transformation have been investigated. The method might be helpful to reduce lattice artifacts in radii and electromagnetic moments.
Authors
Lukas Bovermann
(Ruhr-Universität Bochum)
Evgeny Epelbaum
(Ruhr-Universität Bochum)
Hermann Krebs
(Ruhr-Universität Bochum)
Dean Lee
(Michigan State University)
