Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topology of Andreev Bound States with Flat Dispersion   A theory of dispersionless Andreev bound states on surfaces of time-reversal
invariant unconventional superconductors is presented. The generalized
criterion for the dispersionless Andreev bound state is derived from the
bulk-edge correspondence, and the chiral spin structure of the dispersionless
Andreev bound states is argued from which the Andreev bound state is
stabilized. Then we summarize the criterion in a form of index theorems. The
index theorems are proved in a general framework to certify the bulk-edge
correspondence. As concrete examples, we discuss (i) dxy-wave superconductor
(ii) px-wave superconductor, and (iii) noncentrosymmetric superconductors. In
the last example, we find a peculiar time-reversal invariant Majorana fermion.
The time-reversal invariant Majorana fermion shows an unusual response to the
Zeeman magnetic field, which can be used to identify it experimentally.

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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
3
The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
9
The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: stat
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph