Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Protecting quantum states from decoherence of finite temperature using
  weak measurement   We show how to optimally protect quantum states and quantum entanglement
under non-zero temperature based on measurement reversal from weak measurement.
In particular, we present explicit formulas of the protection.

8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas