TY  - JOUR
AU  - Haller, Andreas
AU  - Matsoukas-Roubeas, Apollonas S.
AU  - Pan, Yueting
AU  - Rizzi, Matteo
AU  - Burrello, Michele
TI  - Exploring helical phases of matter in bosonic ladders
JO  - Physical review research
VL  - 2
IS  - 4
SN  - 2643-1564
CY  - College Park, MD
PB  - APS
M1  - FZJ-2021-06084
SP  - 043433
PY  - 2020
AB  - Ladder models of ultracold atoms offer a versatile platform for the experimental and theoretical study of different phenomena and phases of matter linked to the interplay between artificial gauge fields and interactions. Strongly correlated helical states are known to appear for specific ratios of the particle and magnetic flux densities, and they can often be interpreted as a one-dimensional limit of fractional quantum Hall states, thus being called pretopological. Their signatures, however, are typically hard to observe due to the small gaps characterizing these states. Here we investigate bosonic ladder models at filling factor ν=1. Based on bosonization, renormalization group, and matrix product state simulations we pinpoint two strongly correlated helical phases appearing at this resonance. We show that one of them can be accessed in systems with two-species hardcore bosons and on-site repulsions only, thus amenable for optical lattice experiments. Its signatures are sizable and stable over a broad range of parameters for realistic system sizes.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000605520000004
DO  - DOI:10.1103/PhysRevResearch.2.043433
UR  - https://juser.fz-juelich.de/record/904514
ER  -