Ergodicity breaking arising from Hilbert space fragmentation in dipole-conserving Hamiltonians

P Sala, T Rakovszky, R Verresen, M Knap, F Pollmann - Physical Review X, 2020 - APS
We show that the combination of charge and dipole conservation—characteristic of fracton
systems—leads to an extensive fragmentation of the Hilbert space, which, in turn, can lead …

Wilson-loop characterization of inversion-symmetric topological insulators

A Alexandradinata, X Dai, BA Bernevig - Physical Review B, 2014 - APS
The ground state of translationally invariant insulators comprises bands which can assume
topologically distinct structures. There are few known examples where this distinction is …

Statistical localization: From strong fragmentation to strong edge modes

T Rakovszky, P Sala, R Verresen, M Knap, F Pollmann - Physical Review B, 2020 - APS
Certain disorder-free Hamiltonians can be nonergodic due to a strong fragmentation of the
Hilbert space into disconnected sectors. Here, we characterize such systems by introducing …

Trace index and spectral flow in the entanglement spectrum of topological insulators

A Alexandradinata, TL Hughes, BA Bernevig - Physical Review B—Condensed …, 2011 - APS
We investigate the entanglement spectra of topological insulators, which manifest edge
states on a lattice with spatial boundaries. In the physical energy spectrum, a subset of the …

Exactly Solvable Fermion Chain Describing a Fractional Quantum Hall State

M Nakamura, ZY Wang, EJ Bergholtz - Physical review letters, 2012 - APS
We introduce an exactly solvable fermion chain that describes a ν= 1/3 fractional quantum
Hall (FQH) state beyond the thin-torus limit. The ground state of our model is shown to be …

Decomposition of fractional quantum Hall model states: Product rule symmetries and approximations

R Thomale, B Estienne, N Regnault, BA Bernevig - Physical Review B …, 2011 - APS
We provide a detailed description of a product rule structure of the monomial (Slater)
expansion coefficients of bosonic (fermionic) fractional quantum Hall (FQH) states derived …

From fractional Chern insulators to Abelian and non-Abelian fractional quantum Hall states: Adiabatic continuity and orbital entanglement spectrum

Z Liu, EJ Bergholtz - Physical Review B—Condensed Matter and Materials …, 2013 - APS
The possibility of realizing lattice analogs of fractional quantum Hall (FQH) states, so-called
fractional Chern insulators (FCIs), in nearly flat topological (Chern) bands has attracted a lot …

Edge-mode combinations in the entanglement spectra of non-Abelian fractional quantum Hall states on the torus

Z Liu, EJ Bergholtz, H Fan, AM Läuchli - Physical Review B—Condensed …, 2012 - APS
We present a detailed analysis of bipartite entanglement in the non-Abelian Moore-Read
fractional quantum Hall state of bosons and fermions on the torus. In particular, we show that …

The hierarchical structure in the orbital entanglement spectrum of fractional quantum Hall systems

A Sterdyniak, BA Bernevig, N Regnault… - New Journal of …, 2011 - iopscience.iop.org
We investigated the non-universal part of the orbital entanglement spectrum (OES) of the ν=
1/3 fractional quantum Hall (FQH) effect ground state using Coulomb interactions. The non …

Solvable models for unitary and nonunitary topological phases

Z Papić - Physical Review B, 2014 - APS
We introduce a broad class of simple models for quantum Hall states based on the
expansion of their parent Hamiltonians near the one-dimensional limit of “thin cylinders,” ie …