Fractional domain walls from on-site softening in dipolar bosons
2012 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 85, no 3, 033607- p.Article in journal (Refereed) Published
We study dipolar bosons in a 1D optical lattice and identify a region in parameter space-strong coupling but relatively weak on-site repulsion-hosting a series of stable charge-density-wave (CDW) states whose low-energy excitations, built from fractional domain walls, have remarkable similarities to those of non-Abelian fractional quantum Hall states. Here, a conventional domain wall between translated CDW's may be split by inserting strings of degenerate, but inequivalent, CDW states. Outside these insulating regions, we find numerous supersolids as well as a superfluid regime. The mentioned phases should be accessible experimentally and, in particular, the fractional domain walls can be created in the ground state using single-site addressing, i.e., by locally changing the chemical potential.
Place, publisher, year, edition, pages
2012. Vol. 85, no 3, 033607- p.
Research subject Theoretical Physics
IdentifiersURN: urn:nbn:se:su:diva-76264DOI: 10.1103/PhysRevA.85.033607ISI: 000301104400026OAI: oai:DiVA.org:su-76264DiVA: diva2:528310