35 citations · 136 across the 7 of their papers we have counts for
7 papers
Vacuum Decay in Time-Dependent Backgrounds
Patrick Draper, Manthos Karydas, Hao Zhang
We develop semiclassical methods for studying bubble nucleation in models with parameters that vary slowly in time. Introducing a more general rotation of the time contour allows a…
Spin wave Hamiltonian and anomalous scattering in NiPS
A. Scheie, Pyeongjae Park, J. W. Villanova +8
We report a comprehensive spin wave analysis of the semiconducting honeycomb van der Waal antiferromagnet NiPS. Using single crystal inelastic neutron scattering, we map out th…
Anatomy of topological Anderson transitions
Hao Zhang, Alex Kamenev
We study mesoscopic signatures of the topological Anderson transitions in topological disordered chains. To this end we introduce an integer-valued sample-specific definition of th…
Langevin dynamics of generalized spins as SU() coherent states
David Dahlbom, Cole Miles, Hao Zhang +2
Classical models of spin systems traditionally retain only the dipole moments, but a quantum spin state will frequently have additional structure. Spins of magnitude have $N=2S…
Understanding temperature-dependent SU() spin dynamics in the antiferromagnet BaFeSiO
Seung-Hwan Do, Hao Zhang, David A. Dahlbom +9
Quantum magnets admit more than one classical limit and -level systems with strong single-ion anisotropy are expected to be described by a classical approximation based on SU($N…
Geometric integration of classical spin dynamics via a mean-field Schrödinger equation
David Dahlbom, Hao Zhang, Cole Miles +3
The Landau-Lifshitz equation describes the time-evolution of magnetic dipoles, and can be derived by taking the classical limit of a quantum mechanical spin Hamiltonian. To take th…
Decay and renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet
Seung-Hwan Do, Hao Zhang, Travis J. Williams +8
An ongoing challenge in the study of quantum materials, is to reveal and explain collective quantum effects in spin systems where interactions between different modes types are imp…