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arXiv 0812.4894quant-ph
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环形晶格中原子气体的集体里德伯激发

Collective Rydberg excitations of an atomic gas confined in a ring lattice

B. Olmos, R. González-Férez, I. Lesanovsky

摘要:

研究了周期性边界条件下一维晶格中里德伯原子的激发动力学,原子里德伯态从电子基态共振激发。我们对相应动力学的描述在完美封锁范围内是数值精确的,即在给定范围内没有两个原子可以被激发。详细分析了平均里德伯密度、密度-密度关联以及纠缠特性随时间的演化。我们表明,短时间的动力学是普遍的,占主导地位的量子现象,而更大的时间的晶格的特性变得重要和经典的功能决定的动态。的完美封锁的方法的结果进行了比较的有效哈密顿量,其中包括两个相邻的里德伯原子的相互作用,以二阶微扰理论的预测。

英文摘要:

We study the excitation dynamics of Rydberg atoms in a one-dimensional lattice with periodic boundary conditions where the atomic Rydberg states are resonantly excited from the electronic ground state. Our description of the corresponding dynamics is numerically exact within the perfect blockade regime, i.e. no two atoms in a given range can be excited. The time-evolution of the mean Rydberg density, density-density correlations as well as entanglement properties are analyzed in detail. We demonstrate that the short time dynamics is universal and dominated by quantum phenomena, while for larger time the characteristics of the lattice become important and the classical features determine the dynamics. The results of the perfect blockade approach are compared to the predictions of an effective Hamiltonian which includes the interaction of two neighboring Rydberg atoms up to second order perturbation theory.

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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