Contextual, optimal, and universal realization of the quantum cloning machine and of the NOT gate

被引：59
|
作者：
De Martini, F
Pelliccia, D
Sciarrino, F
机构：
[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[2] Univ Roma La Sapienza, Ist Nazl Fis Mat, I-00185 Rome, Italy
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.92.067901
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A simultaneous realization of the universal optimal quantum cloning machine and of the universal-NOT gate by a quantum injected optical parametric amplification, is reported. The two processes, forbidden in their exact form for fundamental quantum limitations, are found universal and optimal, and the measured fidelity F<1 is found close to the limit values evaluated by quantum theory. This work may enlighten the yet little explored interconnections of fundamental axiomatic properties within the deep structure of quantum mechanics.
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页数：4
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