Multicomponent correlated-basis-function method and its application to multilayered dipolar Bose gases

Michael Rader, Martin Hebenstreit, and Robert E. Zillich
Phys. Rev. A 95, 033625 – Published 24 March 2017

Abstract

We present a method for calculating the dynamics of a bosonic mixture, the multicomponent correlated-basis-function (CBF) method. For a single component, CBF results for the excitation energies agree quite well with experimental results, even for highly correlated systems like He4, and recent systematic improvements of CBF achieve perfect agreement. We give a full derivation of multicomponent CBF, and apply the method to a dipolar Bose gas cut into two-dimensional layers by a deep optical lattice, with coupling between layers due to the long-ranged dipole-dipole interaction. We consider the case of strong coupling, leading to large positive interlayer correlations. We calculate the spectrum for a system of eight layers and show that the strong coupling can lead to a simpler spectrum than in the uncoupled case, with a single peak carrying most of the spectral weight.

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  • Received 16 November 2016

DOI:https://doi.org/10.1103/PhysRevA.95.033625

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsAtomic, Molecular & Optical

Authors & Affiliations

Michael Rader1,2, Martin Hebenstreit1,2, and Robert E. Zillich2,*

  • 1Institute for Theoretical Physics, University of Innsbruck, Technikerstrasse 21a, 6020 Innsbruck, Austria
  • 2Institute for Theoretical Physics, Johannes Kepler University, Altenbergerstrasse 69, 4040 Linz, Austria

  • *robert.zillich@jku.at

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Vol. 95, Iss. 3 — March 2017

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