Peng Rui, Yang Zhen, Wang Dawei, Zhou Ling
Opt Express. 2023 Oct 23;31(22):35754-35764. doi: 10.1364/OE.500912.
The entanglement of macroscopic mechanical oscillators is always an interesting domain. How to entangle multiple mechanical oscillators is still not well answered. In this paper, we investigate the bipartite and tripartite quantum correlations among three distinct mechanical oscillators interacting with one cavity pumped by a multi-tone driving laser. Floquet cavity modes, resulting from different frequency components of the multi-tone driven cavity, are used to construct channels for quantum correlations between mechanical oscillators. By modulating the effective optomechanical coupling, we can manipulate the mechanical entanglement and EPR steering. The numerical results show that the two-tone driving widely employed is not enough to generate tripartite entanglement, while three- and four-tone driving can be employed to generate and enhance genuine tripartite entanglement. All bipartite entanglement can also be modulated. In addition, we demonstrate the monogamous relation of tripartite EPR steering and manipulate the asymmetry of steering. This work provides a method for manipulating the quantum correlation among multiple macroscopic objects.
宏观机械振子的纠缠一直是一个有趣的领域。如何使多个机械振子纠缠仍未得到很好的解答。在本文中，我们研究了与由多频驱动激光泵浦的一个腔相互作用的三个不同机械振子之间的二分和三分量子关联。由多频驱动腔的不同频率成分产生的弗洛凯腔模，被用于构建机械振子之间量子关联的通道。通过调制有效的光机械耦合，我们可以操纵机械纠缠和EPR引导。数值结果表明，广泛使用的双频驱动不足以产生三分纠缠，而三频和四频驱动可用于产生和增强真正的三分纠缠。所有二分纠缠也都可以被调制。此外，我们证明了三分EPR引导的一夫一妻关系，并操纵了引导的不对称性。这项工作提供了一种操纵多个宏观物体之间量子关联的方法。
