Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Economical Phase-Covariant Cloning of Qudits   We derive the optimal N to M phase-covariant quantum cloning for equatorial
states in dimension d with M=kd+N, k integer. The cloning maps are optimal for
both global and single-qudit fidelity. The map is achieved by an ``economical''
cloning machine, which works without ancilla.

10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
18
The categories of this paper are: econ
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an