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arXiv 2604.22151cond-mat.stat-mech
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耦合 D 维 Kuramoto 振子中的长程有序

Long-Range Order in Coupled $D$-dimensional Kuramoto Oscillators

Zhongpu Qiu, Tianyi Wu, Linkai Zhang, Sheng Fang, Jun Meng, Jingfang Fan, Hugues Chaté

AI总结:

研究显示,在低维晶格中,奇数维度的Kuramoto振子系统能产生长程有序,而偶数维度则需有限阈值。通过数值模拟和重整化群分析,发现奇数维度系统映射为铁磁模型,形成有序相,而偶数维度保持无序。

摘要:

我们证明在局部耦合的 D 维向量 Kuramoto 振子系统中,长程有序(LRO)在低维晶格(d=1,2)中显著出现,但仅当 D 为奇数时。这种依赖于奇偶性的效应源于双振子动力学,其中奇数 D 单元在任意耦合下同步,而偶数 D 对需有限阈值。这种根本差异在大系统中选择性地引发集体有序,通过数值模拟验证。重整化群分析揭示 d ≤ 2 时 RG 流向弱耦合固定点。在该极限下,奇数 D 系统有效映射为铁磁模型,形成有序的“半球”相,而偶数 D 系统保持无序。我们的发现进一步表明,方向长程有序在 d=1 和 d=2 中出现,但频率长程有序仅在 d=2 中出现。我们对比了连续对称性模型的已知行为,突显淬火 disorder 提供了实现有序的新根本途径。

英文摘要:

We show that the long-range order (LRO) strikingly emerges in systems of locally coupled $D$-dimensional vector Kuramoto oscillators on low-dimensional lattices ($d=1,2$), but only for odd $D$. This parity-dependent effect is traced to two-oscillator dynamics, where odd-$D$ units synchronize for any coupling, while even-$D$ pairs require a finite threshold. This fundamental difference selectively seeds collective order in large-scale systems, a phenomenon demonstrated by our numerical simulations. A renormalization group analysis reveals a RG flow to a weak-coupling fixed point for $d \le 2$. In this limit, odd-$D$ systems effectively map to a ferromagnetic model, developing an ordered ``hemisphere" phase, whereas even-$D$ systems remain disordered. Our findings further reveal orientational LRO emerges in both $d=1$ and $d=2$, but frequency LRO requires $d=2$. We contrast these results with the established behavior of models possessing continuous symmetry, highlighting how quenched disorder provides a fundamentally new route to order.

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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