English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Phase transitions and adiabatic preparation of a fractional Chern insulator in a boson cold-atom model

MPS-Authors
/persons/resource/persons184781

Motruk,  Johannes
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

/persons/resource/persons145881

Pollmann,  Frank
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Motruk, J., & Pollmann, F. (2017). Phase transitions and adiabatic preparation of a fractional Chern insulator in a boson cold-atom model. Physical Review B, 96(16): 165107. doi:10.1103/PhysRevB.96.165107.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002E-351E-9
Abstract
We investigate the fate of hardcore bosons in a Harper-Hofstadter model which was experimentally realized by Aidelsburger et al. [Nat. Phys. 11, 162 (2015)] at half-filling of the lowest band. We discuss the stability of an emergent fractional Chern insulator (FCI) state in a finite region of the phase diagram that is separated from a superfluid state by a first-order transition when tuning the band topology following the protocol used in the experiment. Since crossing a first-order transition is unfavorable for adiabatically preparing the FCI state, we extend the model to stabilize a featureless insulating state. The transition between this phase and the topological state proves to be continuous, providing a path in parameter space along which an FCI state could be adiabatically prepared. To further corroborate this statement, we perform time-dependent DMRG calculations which demonstrate that the FCI state may indeed be reached by adiabatically tuning a simple product state.