One-to-Many Economical Phase-Covariant Cloning and Telecloning of Qudits
Xin-Wen Wang, Su Yu-Huan, Guojian Yang · Chinese Physics Letters · 2010
We present explicit unitary transformations for realizing both symmetric and asymmetric one-to-many economical phase-covariant clonings of qudits. We also propose a corresponding telecloning scheme. It is shown that the fidelity of the telecloning with nonmaximally entangled states can be larger than that of the corresponding cloning. This implies that partially entangled states can be better than the maximally entangled states for our economical phase-covariant telecloning scheme.