Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of the decoherence of a double quantum dot charge qubit via the
  Redfield equation   By using the Redfield form of the master equation, we investigate the
decoherence times of a double quantum dot charge qubit (DQDCQ) in three
different cases, namely when it is coupled to (I) the piezoelectric coupling
phonon bath (PCPB), (II) the deformation coupling phonon bath (DCPB), and (III)
the Ohmic bath. It is found that our results for case (I) and (II) are in the
same magnitude with those obtained via the exact path integral methods, while
for case (III), the decoherence time is in well agreement with the experimental
value.

23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci