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arXiv 0704.0117quant-ph
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囚禁离子系统中反旋波相互作用引起的低基态

Lower ground state due to counter-rotating wave interaction in trapped ion system

T. Liu, K. L. Wang, M. Feng

备注：
Complete solution of a trapped ion in both strong and weak excitation regimes and beyond Lamb-Dicke limit. Also applicable to JC model relevant problems
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摘要：

本文考虑在两束激光行波辐射下，单离子被限制在阱中。在强激发区，不受Lamb-Dicke极限的限制，系统的哈密顿量类似于不采用旋波近似的Jaynes-Cummings模型。我们开发的方法，使我们能够提出一个完整的本征解，这使得它可以与RWA下的解决方案进行比较。我们发现，在我们的非RWA解决方案的基态的能量低于对应的RWA下。如果离子处于基态，它等价于作用在被俘获离子上的自旋相关力。讨论了有无RWA解之间的差异、相关的实验验证以及在量子信息处理中的可能应用。

英文摘要：

We consider a single ion confined in a trap under radiation of two traveling waves of lasers. In the strong-excitation regime and without the restriction of Lamb-Dicke limit, the Hamiltonian of the system is similar to a driving Jaynes-Cummings model without rotating wave approximation (RWA). The approach we developed enables us to present a complete eigensolutions, which makes it available to compare with the solutions under the RWA. We find that, the ground state in our non-RWA solution is energically lower than the counterpart under the RWA. If we have the ion in the ground state, it is equivalent to a spin dependent force on the trapped ion. Discussion is made for the difference between the solutions with and without the RWA, and for the relevant experimental test, as well as for the possible application in quantum information processing.

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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