Complex-energy description of open molecular and nuclear systems
Abstract
Open quantum systems are quantum systems whose interaction with the environment has a non-negligible effect. Some examples are polarized molecules which can attract an excess electron to form anions or nuclei such as neutron-rich lithium isotopes which can be thought of as a proton and several neutrons coupled to 4He core. Describing open quantum systems is a challenge as one has to go beyond the standard Hilbert formalism to include the scattering space. The Berggren ensemble is a good tool to study open quantum systems as it treats bound states, resonances and non-resonant scattering states on the same footing. I will describe the Berggren basis, and then show how we used it to model molecular multipole anions in terms of a particle-plus-rotor model, with the interaction between the rotating core and the excess electron given by a multipolar deformed Gaussian potential. I will also discuss our recent effort to describe lithium isotopes from 6Li to 11Li using the Gamow shell model, which can be used to describe these exotic nuclei with both continuum effect and correlations between valence nucleons considered.
U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Award No. DE-SC0013365 National Science Foundation under Award No. PHY-1403906.- Publication:
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APS April Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..APRR14008M