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arXiv 0709.2849quant-phphysics.atom-ph
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囚禁里德伯离子:从自旋链到快量子门

Trapped Rydberg Ions: From Spin Chains to Fast Quantum Gates

M. Mueller, L. -M. Liang, I. Lesanovsky, P. Zoller

摘要:

本文研究了束缚在线性Paul阱中的里德伯离子的动力学行为,讨论了在构成阱的静态和含时电场存在下离子里德伯态的性质。研究了多离子系统中的相互作用,导出了线性离子链的内电子态和外振子模的耦合方程。我们表明,强偶极-偶极离子之间的相互作用可以通过微波修整场实现。利用具有大量子亏损的低角动量态,可以将内部动力学映射到一个描述离子晶体中里德伯激发动力学的一对缀饰里德伯态的有效自旋模型上。我们证明了通过离子链的激发转移可以在纳秒的时间尺度上实现,并讨论了在离子链中实现快速双量子位门。

英文摘要:

We study the dynamics of Rydberg ions trapped in a linear Paul trap, and discuss the properties of ionic Rydberg states in the presence of the static and time-dependent electric fields constituting the trap. The interactions in a system of many ions are investigated and coupled equations of the internal electronic states and the external oscillator modes of a linear ion chain are derived. We show that strong dipole-dipole interactions among the ions can be achieved by microwave dressing fields. Using low-angular momentum states with large quantum defect the internal dynamics can be mapped onto an effective spin model of a pair of dressed Rydberg states that describes the dynamics of Rydberg excitations in the ion crystal. We demonstrate that excitation transfer through the ion chain can be achieved on a nanosecond timescale and discuss the implementation of a fast two-qubit gate in the ion chain.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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