Topological bands for ultracold atoms

NR Cooper, J Dalibard, IB Spielman - Reviews of modern physics, 2019 - APS
There have been significant recent advances in realizing band structures with geometrical
and topological features in experiments on cold atomic gases. This review summarizes …

Band geometry, Berry curvature, and superfluid weight

L Liang, TI Vanhala, S Peotta, T Siro, A Harju, P Törmä - Physical Review B, 2017 - APS
We present a theory of the superfluid weight in multiband attractive Hubbard models within
the Bardeen-Cooper-Schrieffer (BCS) mean-field framework. We show how to separate the …

Emergence of the Chern supermetal and pair-density wave through higher-order Van Hove singularities in the Haldane-Hubbard model

P Castro, D Shaffer, YM Wu, LH Santos - Physical Review Letters, 2023 - APS
While advances in electronic band theory have brought to light new topological systems,
understanding the interplay of band topology and electronic interactions remains a frontier …

First-order topological phase transition of the Haldane-Hubbard model

J Imriška, L Wang, M Troyer - Physical Review B, 2016 - APS
We study the interplay of topological band structure and conventional magnetic long-range
order in spinful Haldane model with on-site repulsive interaction. Using the dynamical …

Topological sachdev-ye-kitaev model

P Zhang, H Zhai - Physical Review B, 2018 - APS
In this Rapid Communication, we construct a large-N exactly solvable model to study the
interplay between interaction and topology, by connecting the Sachdev-Ye-Kitaev (SYK) …

Amelioration for the sign problem: an adiabatic quantum Monte Carlo algorithm

MS Vaezi, AR Negari, A Moharramipour, A Vaezi - Physical Review Letters, 2021 - APS
We introduce the adiabatic quantum Monte Carlo (AQMC) method, where we gradually
crank up the interaction strength, as an amelioration of the sign problem. It is motivated by …

Nonequilibrium characterization of equilibrium correlated quantum phases

L Zhang, L Zhang, Y Hu, S Niu, XJ Liu - Physical Review B, 2021 - APS
Quenching a quantum system involves three basic ingredients: the initial phase, the
postquench target phase, and quantum dynamics, which may carry the information of the …

Two-component quantum Hall effects in topological flat bands

TS Zeng, W Zhu, DN Sheng - Physical Review B, 2017 - APS
We study quantum Hall states for two-component particles (hardcore bosons and fermions)
loading in topological lattice models. By tuning the interplay of interspecies and intraspecies …

Bosonic resonating valence bond theory of the possible chiral spin-liquid state in the triangular-lattice Hubbard model

Q Zhang, T Li - Physical Review B, 2021 - APS
Recent numerical simulations find a possible chiral spin-liquid state in the intermediate
coupling regime of the triangular lattice Hubbard model. Here we provide a simple picture …

Lattice symmetry and emergence of antiferromagnetic quantum Hall states

M Ebrahimkhas, M Hafez-Torbati, W Hofstetter - Physical Review B, 2021 - APS
Strong local interaction in systems with nontrivial topological bands can stabilize quantum
states such as magnetic topological insulators. We investigate the influence of the lattice …