| 查看: 241 | 回复: 1 | |||
| 当前主题已经存档。 | |||
[交流]
【资源】中性原子的纠缠
|
|||
|
最近两篇PRL文章做出了中性原子的纠缠。 http://physics.aps.org/synopsis- ... sRevLett.104.010502 Entanglement lies at the heart of quantum computation. Entangling neutral atoms is attractive because they interact weakly with their environment, but by the same token, they are difficult to entangle compared with strongly interacting ions. Papers appearing simultaneously in Physical Review Letters demonstrate how separate groups are achieving entanglement between two neutral atoms by using a method called Rydberg blockade. The underlying idea behind Rydberg blockade is that the state of one atom (the control) determines whether the other (the target) can be excited into a high-energy state. This effective coupling between the two atoms turns them into a collectively two-level system. Tatjana Wilk and colleagues at the Institut d’Optique (CNRS and Université Paris-Sud) in France use the Rydberg blockade to entangle 87Rb atoms that are held a few microns apart by optical tweezers. In a separate paper, Larry Isenhower and colleagues at the University of Wisconsin, US, report similar methods to create a two-qubit controlled-NOT (CNOT) gate between 87Rb atoms. The CNOT gate then serves as a means to achieve entanglement between the atoms. Both groups report the preparation of quantum states with an accuracy (or, fidelity) that is near the threshold needed to prove entanglement; correcting for losses associated with atoms that fell out of the optical traps suggests that the remaining pairs of atoms are entangled with a fidelity well over the threshold. Although there is still work to be done in fine tuning the methods reported by both groups, the papers collectively show important progress toward quantum processing with neutral atoms. – Jessica Thomas and Sonja Grondalski |
回复此楼» 猜你喜欢
265求调剂
已经有9人回复
-
085600材料与化工调剂
已经有20人回复
-
专硕 351 086100 也是考的材科基 本科也是材料
已经有6人回复
-
085600专硕材料与化工348分求调剂
已经有10人回复
-
085600 295分求调剂
已经有21人回复
-
285求调剂
已经有5人回复
-
一志愿安徽大学0817化学工程与技术，求调剂
已经有9人回复
-
一志愿0817化学工程与技术，求调剂
已经有8人回复
-
271分求调剂学校
已经有3人回复
-
生物学308分求调剂（一志愿华东师大）
已经有7人回复
comeanew
铁虫 (初入文坛)
- 应助: 0 (幼儿园)
- 金币: 30.4
- 帖子: 17
- 在线: 5分钟
- 虫号: 103994
- 注册: 2005-11-15
- 性别: GG
- 专业: 凝聚态物性 II ：电子结构
2楼2010-01-23 16:03:38
