par Filip, Radim;Fiurasek, Jaromir 
;Marek, Petr
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 69, 1, page (123141-123147)
Publication Publié, 2004-01
;Marek, PetrRéférence Physical review. A, Atomic, Molecular, and Optical Physics, 69, 1, page (123141-123147)
Publication Publié, 2004-01
Article révisé par les pairs
| Résumé : | The reversibility of optimal Gaussian quantum cloning of coherent state using local operations on clones was discussed. The application of Bell-type homodyne measurement on one clone and anticlone restored an arbitrary unknown input state in other clone by applying local unitary displacement operation. This concept was generalized to partial reversal of cloning by using only local operations and classical communication (LOCC). The reversibility was utilized to improve security of link which assumed quantum cloning as possible eavesdropping attack on quantum communication link. |
