带噪声的自催化反应扩散模型的大尺度突现性质

通过协调热波动和应力在谐振晶格中的动态应力调节器

Emergent dynamic stress regulators via coordinated thermal fluctuations and stress in harmonic crystalline lattices

研究通过热波动和应力的相互作用，在谐振晶格中开发出应力吸收四极结构和应力释放折叠结构，揭示了动态状态的相图，为热环境中的机械装置设计提供了新思路。

Emergent Time Crystal with Tunable Period in the Uniaxial Random Field XY Magnet

The addition of uniaxial random fields to the XY model induces an order-by disorder transition, in which the XY magnet develops a spontaneous magnetization in the direction perpendicular to the uniaxial random field. Here, we use simulations to explore the robustness of this phase transition with respect to a rotating driving field. We find that the order-by-disorder transition is robust, persisting to finite applied field. In the vicinity of the critical driving field strength, a time crystal emerges, in which the period of the limit cycles becomes an integer $n>1$ multiple of the driving per…

Microscopic Reversibility and Emergent Elasticity in Ultrastable Granular Systems

In a recent paper [Phys. Rev. X 12, 031021], we reported experimental observations of ``ultrastable'' states in a shear-jammed granular system subjected to small-amplitude cyclic shear. In such states, all the particle positions and contact forces are reproduced after each shear cycle so that a strobed image of the stresses and particle positions appears static. In the present work, we report further analyses of data from those experiments to characterize both global and local responses of ultrastable states within a shear cycle, not just the strobed dynamics. We find that ultrastable states f…

Emergent tracer dynamics in constrained quantum systems

We show how the tracer motion of tagged, distinguishable particles can effectively describe transport in various homogeneous quantum many-body systems with constraints. We consider systems of spinful particles on a one-dimensional lattice subjected to constrained spin interactions, such that some or even all multipole moments of the effective spin pattern formed by the particles are conserved. On the one hand, when all moments - and thus the entire spin pattern - are conserved, dynamical spin correlations reduce to tracer motion identically, generically yielding a subdiffusive dynamical expone…

Harnessing confinement and driving to tune active particle dynamics

A distinguishing feature of active particles is the nature of the non-equilibrium noise driving their dynamics. Control of these noise properties is, therefore, of both fundamental and applied interest. We demonstrate emergent tuning of the active noise of a granular self-propelled particle by confining it to a quasi one-dimensional channel. We find that this particle, moving like an active Brownian particle (ABP) in two-dimensions, displays run-and-tumble (RTP) characteristics in confinement. We show that the dynamics of the relative orientation co-ordinate of the particle maps to that of a B…

二维无无序的分数扩散

Fractional diffusion without disorder in two dimensions

研究二维中简单局部约束使缺陷呈现可调亚扩散，通过冰型和二聚体型模型揭示丰富动力学现象及有效分数扩散方程，缺陷路径分形维数为5/4，该研究对人工自旋冰和量子模拟器等平台有重要意义。