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Transversal effects on the ground state of hard-core dipolar bosons in one-dimensional optical lattices

Henning Korbmacher1, Gustavo A. Domínguez-Castro1, Wei-Han Li2, Jakub Zakrzewski3,4, and Luis Santos1

  • 1Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstrasse 2, D-30167 Hanover, Germany
  • 2Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, 01187 Dresden, Germany
  • 3Instytut Fizyki Teoretycznej, Uniwersytet Jagielloński, Łojasiewicza 11, PL-30-348 Kraków, Poland
  • 4Mark Kac Complex Systems Research Center, Uniwersytet Jagielloński, PL-30-348 Kraków, Poland

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Phys. Rev. A 107, 063307 – Published 14 June, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.063307

Abstract

Polar lattice gases are usually assumed to have an intersite interaction that decays with the interparticle distance r as 1/r3. However, a loose-enough transversal confinement may strongly modify the dipolar decay in one-dimensional lattices. We show that this modification alters significantly the ground-state properties of hard-core dipolar bosons. For repulsive intersite interactions, the corrected decay alters the conditions for devil's staircase insulators, affecting significantly the particle distribution in the presence of an overall harmonic confinement. For attractive interactions, it results in a reduction of the critical dipole interaction for the formation of self-bound clusters, and for a marked enhancement of the region of liquefied lattice droplets.

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Phys. Rev. A 107, 063307– Published 14 June, 2023
  • Received 3 April 2023
  • Accepted 1 June 2023
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