Efimov universality with Coulomb interaction
| Autor: | Hans-Werner Hammer, C. H. Schmickler, Emiko Hiyama |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Nuclear and High Energy Physics Nuclear Theory Hadron Coulomb barrier FOS: Physical sciences Radius Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Charged particle Universality (dynamical systems) Root mean square Nuclear Theory (nucl-th) Quantum Gases (cond-mat.quant-gas) Quantum mechanics Coulomb Nuclear fusion Physics - Atomic and Molecular Clusters Atomic and Molecular Clusters (physics.atm-clus) Condensed Matter - Quantum Gases |
| Popis: | The universal properties of charged particles are modified by the presence of a long-range Coulomb interaction. We investigate the modification of Efimov universality as a function of the Coulomb strength using the Gaussian expansion method. The resonant short-range interaction is described by Gaussian potentials to which a Coulomb potential is added. We calculate binding energies and root mean square radii for the three- and four-body systems of charged particles and present our results in a generalised Efimov plot. We find that universal features can still be discerned for weak Coulomb interaction, but break down for strong Coulomb interaction. The root-mean-square radius plateaus at increasingly smaller values for strong Coulomb interaction and the probablity distributions of the states become more concentrated inside the Coulomb barrier. As an example, we apply our universal model to nuclei with an alpha-cluster substructure. Our results point to strong non-universal contributions in that sector. 18 pages, 9 figures, final version (with small orthographical corrections) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|