Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Distinguishing two single-mode Gaussian states by homodyne detection: An
  information-theoretic approach   It is known that the quantum fidelity, as a measure of the closeness of two
quantum states, is operationally equivalent to the minimal overlap of the
probability distributions of the two states over all possible POVMs; the POVM
realizing the minimum is optimal. We consider the ability of homodyne detection
to distinguish two single-mode Gaussian states, and investigate to what extent
it is optimal in this information-theoretic sense. We completely identify the
conditions under which homodyne detection makes an optimal distinction between
two single-mode Gaussian states of the same mean, and show that if the Gaussian
states are pure, they are always optimally distinguished.

29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph