Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Anti-Cloning   We derive the transformation for the optimal universal quantum anti-cloner
which produces two anti-parallel outputs for a single input state. The fidelity
is shown to be 2/3 which is same as the measurement fidelity. We consider a
probabilistic quantum anti-cloner and show quantum states can be anti-cloned
exactly with non-zero probability and its efficiency is higher than the
efficiency of distinguishing between the two states.

28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph