Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transport through a double quantum dot with interdot repulsion   We study transport through a double quantum dot with interdot hopping $t$,
intradot repulsion $U$ and interdot repulsion $U^{\prime}$, using the numerical
renormalization group (NRG) method. At half-filling, the conductances in
two-terminal series and four-terminal parallel configuration are calculated via
two phase shifts for quasi-particles of double quantum dot connected to two
noninteracting leads with hybridization strength $\Gamma$. For small values of
$t/\Gamma$ and $U^{\prime}/U$, conductance in the two-terminal series
configuration is suppressed to almost zero. In this region, plateau of
conductance in the four-terminal parallel configuration appears and almost
reaches a unitary limit value $4e^{2}/h$ of two conducting modes. For large
values of $t/\Gamma$ or $U^{\prime}/U$, both conductances are suppressed to
almost zero. The conductance in the two-terminal series configuration almost
reaches a unitary limit value $2e^{2}/h$ only around cross-over regions of
electron-configuration in double quantum dot. Through the behavior of the local
charge and some thermodynamic quantities, we discuss the relation between
transport and electron-configuration.

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The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th