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8 papers
Moiré magnetism in a bilayer Ising model
Ryan Flynn, Anders W. Sandvik
Moiré patterns in magnetic bilayers generate spatially modulated interlayer exchange interactions that can give rise to nonuniform magnetic textures. We study a minimal classical…
SU() Quantum Spin Model with Weak and Strong First-Order Néel to Valence-Bond Solid Transitions
Ryan Flynn, Anders W. Sandvik
We introduce an SU() symmetric two-dimensional quantum spin model, the X-Q model, which hosts a ground state transition between Néel antiferromagnetic and spontaneously dimeriz…
High-precision ground state parameters of the two-dimensional spin-1/2 Heisenberg model on the square lattice
Anders W. Sandvik
Several ground state properties of the square-lattice Heisenberg antiferromagnet are computed (the energy, order parameter, spin stiffness, spinwave velocity, long-waveleng…
Spinons and Spin-Charge Separation at the Deconfined Quantum Critical Point
Sibin Yang, Anders W. Sandvik
Using quantum Monte Carlo and numerical analytic continuation methods, we study the dynamic spin structure factor and the single-hole spectral function of a two-dimensional quantum…
Defects and their Time Scales in Quantum and Classical Annealing of the Two-Dimensional Ising Model
Phillip Weinberg, Na Xu, Anders W. Sandvik
We investigate defects in the two-dimensional transverse-field Ising ferromagnet on periodic lattices after quantum annealing from high to vanishing field. With exact n…
Dynamic structure factor of a spin-1/2 Heisenberg chain with long-range interactions
Sibin Yang, Gabe Schumm, Anders W. Sandvik
We study the dynamic structure factor of the spin-1/2 chain with long-range, power-law decaying unfrustrated (sign alternating) Heisenberg interactions $J_r \sim (-1)^{r-…