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Interplay between shell structure and trap deformation in dipolar Fermi gases

Bengtsson, Jakob LU ; Eriksson, Gunnar LU ; Yousefi, Yousef LU ; Reimann-Wacker, Stephanie M LU and Cremon, Jonas LU (2020) In Physical Review A 102.
Abstract
Finite fermion systems are known to exhibit shell structure in the weakly interacting regime, as is well known from atoms, nuclei, metallic clusters, or even quantum dots in two dimensions. All these systems have in common that the particle interactions between electrons or nucleons are spatially isotropic. Dipolar quantum systems as they have been realized with ultracold gases, however, are governed by an intrinsic anisotropy of the two-body interaction that depends on the orientation of the dipoles relative to each other. Here we investigate how this interaction anisotropy modifies the shell structure in a weakly interacting two-dimensional anisotropic harmonic trap. Going beyond Hartree-Fock analysis by applying the so-called... (More)
Finite fermion systems are known to exhibit shell structure in the weakly interacting regime, as is well known from atoms, nuclei, metallic clusters, or even quantum dots in two dimensions. All these systems have in common that the particle interactions between electrons or nucleons are spatially isotropic. Dipolar quantum systems as they have been realized with ultracold gases, however, are governed by an intrinsic anisotropy of the two-body interaction that depends on the orientation of the dipoles relative to each other. Here we investigate how this interaction anisotropy modifies the shell structure in a weakly interacting two-dimensional anisotropic harmonic trap. Going beyond Hartree-Fock analysis by applying the so-called importance-truncated configuration-interaction (CI) method as well as quadratic CI with single and double substitutions, we show how the magnetostriction in the system may be counteracted upon by a deformation of the confinement. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
102
article number
053302
publisher
American Physical Society
external identifiers
  • scopus:85096313431
ISSN
2469-9926
DOI
10.1103/PhysRevA.102.053302
language
English
LU publication?
yes
id
34bcabf6-6a6f-4562-a84a-cdfbfcbf3a41
date added to LUP
2020-11-17 17:07:08
date last changed
2020-12-08 03:08:02
@article{34bcabf6-6a6f-4562-a84a-cdfbfcbf3a41,
  abstract     = {Finite fermion systems are known to exhibit shell structure in the weakly interacting regime, as is well known from atoms, nuclei, metallic clusters, or even quantum dots in two dimensions. All these systems have in common that the particle interactions between electrons or nucleons are spatially isotropic. Dipolar quantum systems as they have been realized with ultracold gases, however, are governed by an intrinsic anisotropy of the two-body interaction that depends on the orientation of the dipoles relative to each other. Here we investigate how this interaction anisotropy modifies the shell structure in a weakly interacting two-dimensional anisotropic harmonic trap. Going beyond Hartree-Fock analysis by applying the so-called importance-truncated configuration-interaction (CI) method as well as quadratic CI with single and double substitutions, we show how the magnetostriction in the system may be counteracted upon by a deformation of the confinement.},
  author       = {Bengtsson, Jakob and Eriksson, Gunnar and Yousefi, Yousef and Reimann-Wacker, Stephanie M and Cremon, Jonas},
  issn         = {2469-9926},
  language     = {eng},
  month        = {11},
  publisher    = {American Physical Society},
  series       = {Physical Review A},
  title        = {Interplay between shell structure and trap deformation in dipolar Fermi gases},
  url          = {http://dx.doi.org/10.1103/PhysRevA.102.053302},
  doi          = {10.1103/PhysRevA.102.053302},
  volume       = {102},
  year         = {2020},
}