6 papers
Universal Properties of Near-Threshold Single-Neutron Resonances
Myungkuk Kim, Young-Ho Song, Hans-Werner Hammer +3
We establish universal width predictions for near-threshold single-neutron resonances in partial waves. Our results go beyond Wigner's well-known scaling behavior of cross…
Learning shape resonances from the stabilization method
Daniel Kromm, Hans-Werner Hammer, Artem Volosniev
Resonances in quantum mechanics are commonly introduced as quasi-bound states embedded in the continuum, a perspective that can be conceptually challenging due to the abstract natu…
Generalized Gross-Pitaevskii Equation for 2D Bosons with Attractive Interactions
MichaÅ Suchorowski, Fabian Brauneis, Hans-Werner Hammer +2
We introduce a generalized Gross-Pitaevskii equation that provides a nonlinear framework for studying two-dimensional (2D) attractive Bose systems. Its defining feature is the loga…
On the sensitivity of nuclear clocks to new physics
Andrea Caputo, Doron Gazit, Hans-Werner Hammer +4
The recent demonstration of laser excitation of the eV isomeric state of Thorium-229 is a significant step towards a nuclear clock. The low excitation energy likely res…
Effective theory for strongly attractive one-dimensional fermions
Timothy G. Backert, Fabian Brauneis, Matija Äufar +3
We study a one-dimensional system of two-component fermions in the limit of strong attractive particle-particle interactions. First, we analyze scattering in the corresponding few-…
Two-dimensional bosonic droplets in a harmonic trap
Fabian Brauneis, Artem G. Volosniev, Hans-Werner Hammer
We investigate a system of bosons in a two-dimensional harmonic trap. In the limit of strong attractive interactions, the bosons make a droplet insensitive to external confinement.…