Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classical trajectories in quantum transport at the band center of
  bipartite lattices with or without vacancies   Here we report on several anomalies in quantum transport at the band center
of a bipartite lattice with vacancies that are surely due to its chiral
symmetry, namely: no weak localization effect shows up, and, when leads have a
single channel the transmission is either one or zero. We propose that these
are a consequence of both the chiral symmetry and the large number of states at
the band center. The probability amplitude associated to the eigenstate that
gives unit transmission ressembles a classical trajectory both with or without
vacancies. The large number of states allows to build up trajectories that
elude the blocking vacancies explaining the absence of weak localization.

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The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an