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Preprint Sep 2026

Orientational Ordering of Janus Particle Arrays as Classical Compass Spin Systems

Janus-particle arrays provide a soft-matter platform in which particle orientations act as classical spins with anisotropic, bond-dependent interactions. Motivated by recent experiments on triangular arrays of metallodielectric Janus particles exhibiting sixfold orientational order and directly observable vortices and...

Zhi-Jie Fan, Myeonggon Park, M. Vucelja et al. · 0 citations
Preprint Sep 2026

Exact Equivariance from Ordinary Neural Networks for Lattice Many-Body Dynamics

Large-scale simulations of correlated electron systems require repeated evaluations of the electronic forces and transition energies driving collective dynamics. Machine-learning surrogates alleviate this bottleneck, but incorporating symmetry often involves carefully designed descriptors or specialized network archite...

Ho Jang, Sankha Subhra Bakshi, G. Chern · 0 citations
Preprint Aug 2026

Dynamical signatures of deconfined spinons in dimerized sawtooth chains

We study the ground-state properties and dynamical response of the Heisenberg model on the sawtooth chain in and away from the exactly solvable valence-bond-solid (VBS) point. We employ U(1)-symmetric density-matrix renormalization group (DMRG) and time-dependent variational principle (TDVP) methods to compute equilibr...

Nishan Ranabhat, Brandon B. Le, Seung-Hun Lee et al. · 0 citations

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