Bound states of dipolar bosons in one-dimensional systems

A G Volosniev, J R Armstrong, D. V. Fedorov, A. S. Jensen, Manuel Valiente Cifuentes, N T Zinner

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Abstract

We consider one-dimensional tubes containing bosonic polar molecules. The long-range dipole-dipole interactions act both within a single tube and between different tubes. We consider arbitrary values of the externally aligned dipole moments with respect to the symmetry axis of the tubes. The few-body structures in this geometry are determined as a function of polarization angles and dipole strength by using both essentially exact stochastic variational methods and the harmonic approximation. The main focus is on the three-, four- and five-body problems in two or more tubes. Our results indicate that in the weakly coupled limit the intertube interaction is similar to a zero-range term with a suitable rescaled strength. This allows us to address the corresponding many-body physics of the system by constructing a model where bound chains with one molecule in each tube are the effective degrees of freedom. This model can be mapped onto one-dimensional Hamiltonians for which exact solutions are known.

Original languageEnglish
Article number043046
Number of pages20
JournalNew Journal of Physics
Volume15
DOIs
Publication statusPublished - Apr 2013

Keywords

  • INTERACTING BOSE-GAS
  • POLAR-MOLECULES
  • GROUND-STATE
  • PHASE
  • POTENTIALS
  • FERMIONS
  • NUCLEI
  • LAYERS

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