Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Signs of Quantum Dot-Lead Matrix Elements: The Effect on Transport
  vs. Spectral Properties   A small quantum dot coupled to two external leads is considered. Different
signs of the dot-leads coupling matrix elements give rise to qualitatively
different behavior of physical observables such as the conductance, the phase
of the transmission amplitude and the differential capacitance of the dot. For
certain relative signs the conductance may vanish at values of the gate
potential, where the spectral density is maximal. Zeroes of the conductance are
robust against increasing the dot-lead coupling. They are associated with
abrupt phase lapses in the transmission phase whose width vanishes as the
square of the temperature. We carefully distinguish between phase lapses of
$-\pi$ and phase anti-lapses of $\pi$.

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The categories of this paper are: chao-dyn
2
The categories of this paper are: math
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph