摘要
In a recent paper, Sacchi (Phys. Rev. Lett. 96(2006)220502) studied the information-disturbance tradeoff in estimating an unknown two-qubit maximally entangled state. In this study, we explore the tradeoff in estimating an unknown three-qubit GHZ state. The optimal estimation process supplies a fidelity of (13/54) and the tradeoff interpolates smoothly between non-informative measurement and optimal estimation process.
| 源语言 | 英语 |
|---|---|
| 文章编号 | 008 |
| 页（从-至） | 1456-1459 |
| 页数 | 4 |
| 期刊 | Chinese Physics Letters |
| 卷 | 24 |
| 期 | 6 |
| DOI | |
| 出版状态 | 已出版 - 1 6月 2007 |
| 已对外发布 | 是 |