Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Qubit feedback and control with kicked quantum nondemolition
  measurements: A quantum Bayesian analysis   The informational approach to continuous quantum measurement is derived from
POVM formalism for a mesoscopic scattering detector measuring a charge qubit.
Quantum Bayesian equations for the qubit density matrix are derived, and cast
into the form of a stochastic conformal map. Measurement statistics are derived
for kicked quantum nondemolition measurements, combined with conditional
unitary operations. These results are applied to derive a feedback protocol to
produce an arbitrary pure state after a weak measurement, as well as to
investigate how an initially mixed state becomes purified with and without
feedback.

23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th