Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gapless state of interacting Majorana fermions in a strain-induced
  Landau level   Mechanical strain can generate a pseudo-magnetic field, and hence Landau
levels (LL), for low energy excitations of quantum matter in two dimensions. We
study the collective state of the fractionalised Majorana fermions arising from
residual generic spin interactions in the central LL, where the projected
Hamiltonian reflects the spin symmetries in intricate ways: emergent U(1) and
particle-hole symmetries forbid any bilinear couplings, leading to an
intrinsically strongly interacting system; also, they allow the definition of a
filling fraction, which is fixed at 1/2. We argue that the resulting many-body
state is gapless within our numerical accuracy, implying ultra-short-ranged
spin correlations, while chirality correlators decay algebraically. This
amounts to a Kitaev `non-Fermi' spin liquid, and shows that interacting
Majorana Fermions can exhibit intricate behaviour akin to fractional quantum
Hall physics in an insulating magnet.

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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th