Compact U k ( 1 ) Chern-Simons Theory as a Local Bosonic Lattice Model with Exact Discrete 1-Symmetries
Name
PhysRevLett.126.021603.pdf
Description
Published version
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172.66 KB
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Adobe PDF
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Author(s)
DeMarco, Michael
Wen, Xiao-Gang
Date Issued
2021
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
DeMarco, Michael and Wen, Xiao-Gang. 2021. "Compact U k ( 1 ) Chern-Simons Theory as a Local Bosonic Lattice Model with Exact Discrete 1-Symmetries." Physical Review Letters, 126 (2).
Version
Final published version
Abstract
© 2021 American Physical Society. We propose a bosonic Uκ(1) rotor model on a three dimensional spacetime lattice. With the inclusion of a Maxwell term, we show that the low-energy properties of our model can be obtained reliably via a semiclassical approach. Those properties are the same as that of the Chern-Simons field theory, S=∫d3x(KIJ/4π)AIdAJ. We require the lattice variables on each link to be compact(i.e., take values on circles), which enforces the quantization of the K matrix as a symmetric integer matrix with even diagonals. Our lattice model also has exact 1-symmetries, which gives rise to the 1-form symmetry in the Chern-Simons field theory. In particular, some of those 1-symmetries areanomalous (i.e., non-on-site) in the expected way. The anomaly can be probed via the breaking of those lattice 1-symmetries by the boundaries.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.126.021603
