利用原子自由空间亚波长阵列的光子非线性
Exploiting the Photonic Non-linearity of Free Space Subwavelength Arrays of Atoms
AI总结：
本文研究亚波长原子阵列的内在光子非线性，提出利用双激发散射在一维阵列中制备单激发暗态并在平行阵列间实现纠缠，同时给出抑制质心涨落误差的方案。
摘要：
有序原子系综（例如原子阵列）表现出与其无序对应物不同的特征。特别是，尽管无序系综中的集体模式呈现线性光学响应，但亚波长阵列的集体亚辐射激发却具有内在的非线性。这种非线性同时包含相干分量和耗散分量：在阵列中传播的两个激发彼此散射，从而导致关联形成并发射到自由空间模式。我们展示了如何利用这种非线性，在一维阵列的亚辐射（暗）集体态中相干地制备单个激发，以及对平行阵列的暗态执行纠缠操作。我们讨论了由原子质心涨落所引入的无序这一主要误差来源，并提出了一种减轻其影响的实用方法。
英文摘要：
Ordered ensembles of atoms, such as atomic arrays, exhibit distinctive features from their disordered counterpart. In particular, while collective modes in disordered ensembles show a linear optical response, collective subradiant excitations of subwavelength arrays are endowed with an intrinsic non-linearity. Such non-linearity has both a coherent and a dissipative component: two excitations propagating in the array scatter off each other leading to formation of correlations and to emission into free space modes. We show how to take advantage of such non-linearity to coherently prepare a single excitation in a subradiant (dark) collective state of a one dimensional array as well as to perform an entangling operation on dark states of parallel arrays. We discuss the main source of errors represented by disorder introduced by atomic center-of-mass fluctuations, and we propose a practical way to mitigate its effects.
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。
