Edge spin accumulation in a two-dimensional electron gas with two subbands
Investigation of emergent quantum phenomena in systems with reduced size and dimen...
| Full text | |
| Author(s): |
Adhikari, S. K.
Total Authors: 1
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| Document type: | Journal article |
| Source: | LASER PHYSICS LETTERS; v. 15, n. 9 SEP 2018. |
| Web of Science Citations: | 5 |
| Abstract | |
We demonstrate the possibility of creating a self-bound stable three-dimensional matter-wave spherical boson-fermion quantum ball in the presence of an attractive boson-fermion interaction and a small repulsive three-boson interaction. The two-boson interaction could be attractive or repulsive whereas the fermions are taken to be in a fully-paired super-fluid state in the Bardeen-Cooper-Schreifer (quasi-noninteracting weak-coupling) limit. We also include the Lee-Huang-Yang (LHY) correction to a repulsive bosonic interaction term. The repulsive three-boson interaction and the LHY correction can stop a global collapse while acting jointly or separately. The present study is based on a mean-field model, where the bosons are subject to a Gross-Pitaevskii (GP) Lagrangian functional and the fully-paired fermions are described by a Galilean-invariant density functional Lagrangian. The boson-fermion interaction is taken to be the mean-field Hartree interaction, quite similar to the interaction term in the GP equation. The study is illustrated by a variational and a numerical solution of the mean-field model for the boson-fermion Li-7-Li-6 system. (AU) | |
| FAPESP's process: | 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics |
| Grantee: | Nathan Jacob Berkovits |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 12/00451-0 - Study of properties of Bose-Einstein Condensate: dipolar atoms and condensate of fermions |
| Grantee: | Sadhan Kumar Adhikari |
| Support Opportunities: | Research Projects - Thematic Grants |