Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Using states with a large photon number variance to increase quantum
  Fisher information in single-mode phase estimation   When estimating the phase of a single mode, the quantum Fisher information
for a pure probe state is proportional to the photon number variance of the
probe state. In this work, we point out particular states that offer photon
number distributions exhibiting a large variance, which would help to improve
the local estimation precision. These theoretical examples are expected to
stimulate the community to put more attention to those states that we found,
and to work towards their experimental realization and usage in quantum
metrology.

23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys