Phase-covariant quantum cloning of qudits
Quantum Physics
2009-11-07 v3
Abstract
We study the phase-covariant quantum cloning machine for qudits, i.e. the input states in d-level quantum system have complex coefficients with arbitrary phase but constant module. A cloning unitary transformation is proposed. After optimizing the fidelity between input state and single qudit reduced density opertor of output state, we obtain the optimal fidelity for 1 to 2 phase-covariant quantum cloning of qudits and the corresponding cloning transformation.
Cite
@article{arxiv.quant-ph/0205126,
title = {Phase-covariant quantum cloning of qudits},
author = {Heng Fan and Hiroshi Imai and Keiji Matsumoto and Xiang-Bin Wang},
journal= {arXiv preprint arXiv:quant-ph/0205126},
year = {2009}
}
Comments
Revtex, 6 pages