Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Markovian dynamics and noise characteristics in continuous
  measurement of a solid-state charge qubit   We investigate the non-Markovian characteristics in continuous measurement of
a charge qubit by a quantum point contact. The backflow of information from the
reservoir to the system in the non-Markovian domain gives rise to strikingly
different qubit relaxation and dephasing in comparison with the Markovian case.
The intriguing non-Markovian dynamics is found to have a direct impact on the
output noise feature of the detector. Unambiguously, we observe that the
non-Markovian memory effect results in an enhancement of the signal-to-noise
ratio, which can even exceed the upper limit of ``4'', leading thus to the
violation of the Korotkov-Averin bound in quantum measurement. Our study thus
may open new possibilities to improve detector's measurement efficiency in a
direct and transparent way.

20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th