Intra‐Cavity Laser Manipulation of High‐Dimensional Non‐Separable States
Intra‐Cavity Laser Manipulation of High‐Dimensional Non‐Separable States
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DOI：
10.1002/lpor.202300593
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发表时间：
2023-11
影响因子：
11
通讯作者：
L. Hai;Zhichao Zhang;Shilong Liu;Lang Li;Zhiyuan Zhou;Qing Wang;Yanze Gao;Chunqing Gao
中科院分区：
文献类型：
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作者：
L. Hai;Zhichao Zhang;Shilong Liu;Lang Li;Zhiyuan Zhou;Qing Wang;Yanze Gao;Chunqing Gao
结构光的不可分态具有与量子纠缠类似的数学形式，这为模拟量子过程提供了一种有效的途径。然而，类似于多粒子纠缠的经典多体不可分态只能通过光的大体积自由空间调制来控制，通过将多个自由度（DoF）与轨道角动量（OAM）耦合以实现高维性，并通过其他DoF来模拟多方。本文提出了一种从简单激光腔中直接发射多粒子不可分态来模拟多粒子量子纠缠的方案。通过在激光腔内操纵三个自由度作为OAM、偏振和波矢量，可以根据需要生成和控制八维（8D）三重态和所有Greenberger-Horne-Zeilinger（GHZ）类态。此外，提出了一种有效的方法来执行状态层析成像，采用卷积神经网络（CNN），用于测量生成的GHZ-类状态，最高保真度高达95.11%。这项工作揭示了对高维多体不可分态进行腔内操作的可行性，为量子经典类比打开了一个紧凑的设备，并为先进的量子场景铺平了道路。
Non‐separable states of structured light have the analogous mathematical forms with quantum entanglement, which offer an effective way to simulate quantum process. However, the classical multi‐partite non‐separable states analogue to multi‐particle entanglements can only be controlled by bulky free‐space modulation of light through coupling multiple degrees of freedom (DoFs) with orbital angular momentum (OAM) to achieve high dimensionality and other DoFs to emulate multi‐parties. In this paper, a scheme is proposed to directly emit multi‐partite non‐separable states from a simple laser cavity to mimic multi‐particle quantum entanglement. Through manipulating three DoFs as OAM, polarization, and wavevector inside a laser cavity, the eight‐dimensional (8D) tripartite states and all Greenberger‐Horne‐Zeilinger (GHZ)‐like states can be generated and controlled on demand. In addition, an effective method is proposed to perform state tomography employing convolutional neural network (CNN), for measuring the generated GHZ‐like states with highest fidelity up to 95.11%. This work reveals a feasibility of intra‐cavity manipulation of high‐dimensional multipartite non‐separable states, opening a compact device for quantum‐classical analogy and paving the path for advanced quantum scenarios.