近日，日本冲绳科学技术大学教授Jason Twamley团队实现了通过腔磁力学中的多体相互作用增强宏观多模纠缠。相关论文发表在2025年3月6日出版的《物理评论A》杂志上。

多体相互作用的相干控制实现了为未来的量子技术生成复杂的量子态。具体来说，在混合系统中，与环境高度隔离的被捕获宏观粒子的质心运动的量子态是测试宏观量子力学的潜在平台。

研究组提出了一种多体相互作用平台来增强多模高斯纠缠，其中质心运动通过微波场耦合到磁振子。强和超强腔磁振子耦合允许通过参数的数值优化在所有二分体中同时产生纠缠，而没有任何成对纠缠，类似于自旋系统中的量子相变。此外，超强耦合有助于在未解析边带中的低频振荡器产生这种多模纠缠。该方案为探索大型大质量振荡器中的量子效应提供了一个潜在的平台，并为创建用于量子模拟、传感、探索奇异量子相和量子计算的复杂态铺平了道路。

附：英文原文

Title: Enhancing macroscopic multimode entanglement through many-body interactions in cavity magnomechanics

Author: Anil Kumar Chauhan, A. Kani, Jason Twamley

Issue&Volume: 2025/03/06

Abstract: Coherent control of many-body interactions allows the possibility of generating complex quantum states for future quantum technology. Specifically, the quantum states of the center-of-mass motion of a trapped macroscopic particle, being highly isolated from the environment, in hybrid systems is a potential platform for testing macroscopic quantum mechanics. We present a many-body interaction platform to enhance multimode Gaussian entanglement where the center-of-mass motion is coupled to a magnon through a microwave field. The strong and ultrastrong cavity-magnon couplings allow the generation of simultaneous entanglement in all bipartitions, without any pairwise entanglement, through numerical optimization of parameters, akin to quantum phase transitions in spin systems. Moreover, the ultrastrong coupling facilitates the generation of such multimode entanglement for a low-frequency oscillator in the unresolved sideband. This scheme provides a potential platform to explore the quantum effects in a large massive oscillator and paves the way for creating complex states for quantum simulation, sensing, exploring exotic quantum phases, and quantum computing.

DOI: 10.1103/PhysRevA.111.033505

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.033505