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Titel:

Fractional corner charges in a two-dimensional superlattice Bose-Hubbard model

Dokumenttyp:
Zeitschriftenaufsatz
Autor(en):
Bibo, Julian; Lovas, Izabella; You, Yizhi; Grusdt, Fabian; Pollmann, Frank
Abstract:
We study higher order topology in the presence of strong interactions in a two-dimensional, experimentally accessible superlattice Bose-Hubbard model with alternating hoppings and strong on-site repulsion. We evaluate the phase diagram of the model around half-filling using the density renormalization group ansatz and find two gapped phases separated by a gapless superfluid region. We demonstrate that the gapped states realize two distinct higher order symmetry protected topological phases, whic...     »
Zeitschriftentitel:
Physical Review B 2020-07
Jahr:
2020
Band / Volume:
102
Heft / Issue:
4
Volltext / DOI:
doi:10.1103/physrevb.102.041126
Verlag / Institution:
American Physical Society (APS)
E-ISSN:
2469-99502469-9969
Publikationsdatum:
30.07.2020
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