Edge states and the Invariant

Rodrigo Fresneda (Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, 09210-580, Santo André, SP, Brazil) ; Lucas de Souza (Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, 09210-580, Santo André, SP, Brazil) ; Dmitri Vassilevich (Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, 09210-580, Santo André, SP, Brazil)

We propose a relation between the η invariant on a manifold with boundary, the η invariants of edge states, and the η invariant in an infinite volume limit. With the example of planar fermions with bag and chiral bag boundary conditions we show that this relation holds whenever edge states are sufficiently well-localized near the boundary. As a by-product we show that the spectrum of edge modes for chiral bag boundary conditions is linear but bounded.

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      "value": "We propose a relation between the \u03b7 invariant on a manifold with boundary, the \u03b7 invariants of edge states, and the \u03b7 invariant in an infinite volume limit. With the example of planar fermions with bag and chiral bag boundary conditions we show that this relation holds whenever edge states are sufficiently well-localized near the boundary. As a by-product we show that the spectrum of edge modes for chiral bag boundary conditions is linear but bounded."
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Published on:
28 July 2023
Publisher:
Elsevier
Published in:
Physics Letters B , Volume 844 C (2023)

Article ID: 138098
DOI:
https://doi.org/10.1016/j.physletb.2023.138098
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: