Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A non-Markovian decoherence theory for double dot charge qubit   In this paper, we develop a non-perturbation theory for describing
decoherence dynamics of electron charges in a double quantum dot gated by
electrodes. We extend the Feynman-Vernon influence functional theory to
fermionic environments and derive an exact master equation for the reduced
density matrix of electrons in the double dot for a general spectral density at
arbitrary temperature and bias. We then investigate the decoherence dynamics of
the double dot charge qubit with back-action of the reservoirs being fully
taken into account. Time-dependent fluctuations and leakage effects induced
from the dot-reservoir coupling are explicitly explored. The charge qubit
dynamics from the Markovian to non-Markovian regime is systematically studied
under various manipulating conditions. The decay behavior of charge qubit
coherence and the corresponding relaxation time $T_1$ and dephasing time $T_2$
are analyzed in details.

12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
2
The categories of this paper are: math