Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unraveling of a generalized quantum Markovian master equation and its
  application in feedback control of a charge qubit   In the context of a charge qubit under continuous monitoring by a single
electron transistor, we propose an unraveling of the generalized quantum
Markovian master equation into an ensemble of individual quantum trajectories
for stochastic point process. A suboptimal feedback algorism is implemented
into individual quantum trajectories to protect a desired pure state. Coherent
oscillations of the charge qubit could be maintained in principle for an
arbitrarily long time in case of sufficient feedback strength. The
effectiveness of the feedback control is also reflected in the detector's noise
spectrum. The signal-to-noise ratio rises significantly with increasing
feedback strength such that it could even exceed the Korotkov-Averin bound in
quantum measurement, manifesting almost ideal quantum coherent oscillations of
the qubit. The proposed unraveling and feedback protocol may open up the
prospect to sustain ideal coherent oscillations of a charge qubit in quantum
computation algorithms.

17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph