dc.identifier.uri |
http://dx.doi.org/10.15488/2049 |
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dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/2074 |
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dc.contributor.author |
Greschner, Sebastian
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dc.contributor.author |
Piraud, M.
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dc.contributor.author |
Heidrich-Meisner, F.
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dc.contributor.author |
McCulloch, I.P.
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dc.contributor.author |
Schollwöck, U.
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dc.contributor.author |
Vekua, T.
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dc.date.accessioned |
2017-10-20T09:05:08Z |
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dc.date.available |
2017-10-20T09:05:08Z |
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dc.date.issued |
2016 |
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dc.identifier.citation |
Greschner, S.; Piraud, M.; Heidrich-Meisner, F.; McCulloch, I.P.; Schollwöck, U.; Vekua, T.: Symmetry-broken states in a system of interacting bosons on a two-leg ladder with a uniform Abelian gauge field. In: Physical Review A 94 (2016), Nr. 6, No. 63628. DOI: https://doi.org/10.1103/PhysRevA.94.063628 |
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dc.description.abstract |
We study the quantum phases of bosons with repulsive contact interactions on a two-leg ladder in the presence of a uniform Abelian gauge field. The model realizes many interesting states, including Meissner phases, vortex fluids, vortex lattices, charge density waves, and the biased-ladder phase. Our work focuses on the subset of these states that breaks a discrete symmetry. We use density matrix renormalization group simulations to demonstrate the existence of three vortex-lattice states at different vortex densities and we characterize the phase transitions from these phases into neighboring states. Furthermore, we provide an intuitive explanation of the chiral-current reversal effect that is tied to some of these vortex lattices. We also study a charge-density-wave state that exists at 1/4 particle filling at large interaction strengths and flux values close to half a flux quantum. By changing the system parameters, this state can transition into a completely gapped vortex-lattice Mott-insulating state. We elucidate the stability of these phases against nearest-neighbor interactions on the rungs of the ladder relevant for experimental realizations with a synthetic lattice dimension. A charge-density-wave state at 1/3 particle filling can be stabilized for flux values close to half a flux quantum and for very strong on-site interactions in the presence of strong repulsion on the rungs. Finally, we analytically describe the emergence of these phases in the low-density regime, and, in particular, we obtain the boundaries of the biased-ladder phase, i.e., the phase that features a density imbalance between the legs. We make contact with recent quantum-gas experiments that realized related models and discuss signatures of these quantum states in experimentally accessible observables. © 2016 American Physical Society. |
eng |
dc.language.iso |
eng |
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dc.publisher |
College Park, MD : American Physical Society |
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dc.relation.ispartofseries |
Physical Review A 94 (2016), Nr. 6 |
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dc.rights |
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. |
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dc.subject |
Bosons |
eng |
dc.subject |
Charge density |
eng |
dc.subject |
Charge density waves |
eng |
dc.subject |
Crystal lattices |
eng |
dc.subject |
Gages |
eng |
dc.subject |
Neodymium compounds |
eng |
dc.subject |
Statistical mechanics |
eng |
dc.subject |
Superconducting materials |
eng |
dc.subject |
Vortex flow |
eng |
dc.subject |
Charge density wave state |
eng |
dc.subject |
Contact interaction |
eng |
dc.subject |
Density matrix renormalization group |
eng |
dc.subject |
Experimental realizations |
eng |
dc.subject |
Interacting bosons |
eng |
dc.subject |
Interaction strength |
eng |
dc.subject |
Mott-insulating state |
eng |
dc.subject |
Nearest-neighbor interactions |
eng |
dc.subject |
Quantum theory |
eng |
dc.subject.ddc |
530 | Physik
|
ger |
dc.title |
Symmetry-broken states in a system of interacting bosons on a two-leg ladder with a uniform Abelian gauge field |
eng |
dc.type |
Article |
|
dc.type |
Text |
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dc.relation.issn |
24699926 |
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dc.relation.doi |
https://doi.org/10.1103/PhysRevA.94.063628 |
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dc.bibliographicCitation.issue |
6 |
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dc.bibliographicCitation.volume |
94 |
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dc.bibliographicCitation.firstPage |
63628 |
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dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
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