• Citer

Cloning a real [Formula Presented]-dimensional quantum state on the edge of the no-signaling condition

par Navez, Patrick ;Cerf, Nicolas
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 68, 3, page (6)
Publication Publié, 2003

Article révisé par les pairs

• Détails
• Contenu

Résumé :

We investigate the class of quantum cloning machines that equally duplicate all real states in a Hilbert space of arbitrary dimension. By using the no-signaling condition, namely, that cloning cannot make superluminal communication possible, we derive an upper bound on the fidelity of this class of quantum cloning machines. Then, for each dimension d, we construct an optimal symmetric cloner whose fidelity saturates this bound. Similar calculations can also be performed in order to recover the fidelity of the optimal universal cloner in d dimensions. © 2003 The American Physical Society.