Continuous Preparation of a Fractional Chern Insulator

We present evidence of a direct, continuous quantum phase transition between a Bose superfluid and the \(\nu=1/2\) fractional Chern insulator in a microscopic lattice model. In the process, we develop a detailed field theoretic description of this transition in terms of the low energy vortex dynamic...

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Bibliographic Details
Published in:arXiv.org 2014-11
Main Authors: Barkeshli, M, Yao, N Y, Laumann, C R
Format: Article
Language:English
Subjects:
Fluids
Forbidden transitions
Phase transitions
Superfluidity
Online Access:Get full text
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Summary:We present evidence of a direct, continuous quantum phase transition between a Bose superfluid and the \(\nu=1/2\) fractional Chern insulator in a microscopic lattice model. In the process, we develop a detailed field theoretic description of this transition in terms of the low energy vortex dynamics. The theory explicitly accounts for the structure of lattice symmetries and predicts a Landau forbidden transition that is protected by inversion. That the transition is continuous enables the quasi-adiabatic preparation of the fractional Chern insulator in non-equilibrium, quantum optical systems.
ISSN:2331-8422
DOI:10.48550/arxiv.1407.7034