Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Erasable and unerasable correlations   We address the problem of removing correlation from sets of states while
preserving as much local quantum information as possible. We prove that states
obtained from universal cloning can only be decorrelated at the expense of
complete erasure of local information (i.e. information about the copied
state). We solve analytically the problem of decorrelation for two qubits and
two qumodes (harmonic oscillators in Gaussian states), and provide sets of
decorrelable states and the minimum amount of noise to be added for
decorrelation.

7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin