Semiclassical dynamics of spin density waves

  title={Semiclassical dynamics of spin density waves},
  author={Gia-Wei Chern and Kipton Barros and Zhentao Wang and Hidemaro Suwa and Cristian D. Batista},
  journal={Physical Review B},
We present a theoretical framework for equilibrium and nonequilibrium dynamical simulation of quantum states with spin-density-wave (SDW) order. Within a semiclassical adiabatic approximation that retains electron degrees of freedom, we demonstrate that the SDW order parameter obeys a generalized Landau-Lifshitz equation. With the aid of an enhanced kernel polynomial method, our linear-scaling quantum Landau-Lifshitz dynamics (QLLD) method enables dynamical SDW simulations with $N \simeq 10^5… Expand

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