Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multilevel coherences in quantum dots   We study transport through strongly interacting quantum dots with $N$ energy
levels that are weakly coupled to generic multi-channel metallic leads. In the
regime of coherent sequential tunneling, where level spacing and broadening are
of the same order but small compared to temperature, we present a unified,
$SU(N)$-invariant form of the kinetic equation for the reduced density matrix
of the dot and the tunneling current. This is achieved by introducing the
concept of flavor polarization for the dot and the reservoirs, and splitting
the kinetic equation in terms of flavor accumulation, anisotropic flavor
relaxation, as well as exchange-field- and detuning-induced flavor rotation. In
particular, we identify the exchange field as the cause of negative
differential conductance at off-resonance bias voltages appearing in generic
quantum-dot models. To illustrate the notion of flavor polarization, we analyze
the non-linear current through a triple quantum-dot device.

22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas