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Chinese Physics Letters

Cluster States from Quantum Logic Gates with Trapped Ions in Thermal Motion

Wen‐Xing Yang, 詹志明, 李家华

Published Jan 1, 2006• 0 citations
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Abstract

由 Briegel et 跟随最近的建议一] 。[Phys。加快。Lett。86 (2001 ) 910 ] ，一个过程为在热运动与二个套住的离子认识到量控制阶段门的一步舞被建议。计划能也被用来创造纠缠的状态的一种新特殊类型，这被显示出，即，许多的簇状态套住离子。在计划，二陷井的离子被一根单个激光横梁同时激动，激光横梁的频率稍微关有第一的回声降低套住的离子的颤动边带。计划的明显的优点是它不把震动的模式用作数据公共汽车。而且，我们的计划对起始的动的状态感觉迟钝并且加热(或腐烂) 只要系统留在 Lamb-Dicke 政体。

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由 Briegel et 跟随最近的建议一] 。[Phys。加快。Lett。86 (2001 ) 910 ] ，一个过程为在热运动与二个套住的离子认识到量控制阶段门的一步舞被建议。计划能也被用来创造纠缠的状态的一种新特殊类型，这被显示出，即，许多的簇状态套住离子。在计划，二陷井的离子被一根单个激光横梁同时激动，激光横梁的频率稍微关有第一的回声降低套住的离子的颤动边带。计划的明显的优点是它不把震动的模式用作数据公共汽车。而且，我们的计划对起始的动的状态感觉迟钝并且加热(或腐烂) 只要系统留在 Lamb-Dicke 政体。
Following the recent proposal by Briegel et al. [Phys. Rev. Lett. 86 (2001) 910], a procedure is proposed for one-step realizing quantum control phase gates with two trapped ions in thermal motion. It is shown that the scheme can also be used to create a new special type of entangled states, i.e., cluster states of many trapped ions. In the scheme the two-trapped ions are simultaneously excited by a single laser beam and the frequency of the laser beam is slightly off resonance with the first lower vibration sideband of the trapped ions. The distinct advantage of the scheme is that it does not use the vibrational mode as the data bus. Furthermore, our scheme is insensitive to both the initial motional state and heating (or decay) as long as the system remains in the Lamb–Dicke regime.