Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unambiguous discrimination of mixed states: A description based on
  system-ancilla coupling   We propose a general description on the unambiguous discrimination of mixed
states according to the system-environment coupling, and present a procedure to
reduce this to a standard semidefinite programming problem. In the two states
case, we introduce the canonical vectors and partly simplify the problem to the
case of discrimination between pairs of canonical vectors. By considering the
positivity of the two by two matrices, we obtain a series of new upper bounds
of the total success probability which depends on both the prior probabilities
and specific state structures.

23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph