摘要
A scheme to implement of 1 →3 economic phase-covariant cloning machine for unknown equator state in cavity-QED is proposed. The scheme requires cavity-assisted collision processes between atoms, which cross through nonresonant cavity fields in the vacuum states. The cavity fields are only virtually excited so that the cavity quality factor can be loosened.
基金
The project supported by National Natural Science Foundation of China under Grant No.10574001
the Science Foundation of Education Department of Anhui Province under Grant No.KJ2007A002
