The nonequilibrium dynamics of domain wall initial states in a classical anisotropic Heisenberg chain exhibits a striking coexistence of apparently linear and nonlinear behaviors: the propagation and spreading of the domain wall can be captured quantitatively by linear, i.e., noninteracting, spin wave theory absent its usual justifications; while, simultaneously, for a wide range of easy-plane anisotropies, emission can take the place of stable solitons—a process and objects intrinsically associated with interactions and nonlinearities. The easy-axis domain wall only has transient dynamics, the isotropic one broadens diffusively, while the easy-plane one yields a pair of ballistically counterpropagating domain walls which, unusually, broaden subdiffusively, their width scaling as t^1/3.
%0 Journal Article
%1 PhysRevLett.132.057202
%A McRoberts, Adam J.
%A Bilitewski, Thomas
%A Haque, Masudul
%A Moessner, Roderich
%D 2024
%I American Physical Society
%J Phys. Rev. Lett.
%K b
%N 5
%P 057202
%R 10.1103/PhysRevLett.132.057202
%T Domain wall dynamics in classical spin chains: free propagation, subdiffusive spreading, and soliton emission
%U https://link.aps.org/doi/10.1103/PhysRevLett.132.057202
%V 132
%X The nonequilibrium dynamics of domain wall initial states in a classical anisotropic Heisenberg chain exhibits a striking coexistence of apparently linear and nonlinear behaviors: the propagation and spreading of the domain wall can be captured quantitatively by linear, i.e., noninteracting, spin wave theory absent its usual justifications; while, simultaneously, for a wide range of easy-plane anisotropies, emission can take the place of stable solitons—a process and objects intrinsically associated with interactions and nonlinearities. The easy-axis domain wall only has transient dynamics, the isotropic one broadens diffusively, while the easy-plane one yields a pair of ballistically counterpropagating domain walls which, unusually, broaden subdiffusively, their width scaling as t^1/3.
@article{PhysRevLett.132.057202,
abstract = {The nonequilibrium dynamics of domain wall initial states in a classical anisotropic Heisenberg chain exhibits a striking coexistence of apparently linear and nonlinear behaviors: the propagation and spreading of the domain wall can be captured quantitatively by linear, i.e., noninteracting, spin wave theory absent its usual justifications; while, simultaneously, for a wide range of easy-plane anisotropies, emission can take the place of stable solitons—a process and objects intrinsically associated with interactions and nonlinearities. The easy-axis domain wall only has transient dynamics, the isotropic one broadens diffusively, while the easy-plane one yields a pair of ballistically counterpropagating domain walls which, unusually, broaden subdiffusively, their width scaling as t^1/3.},
added-at = {2024-04-26T15:04:08.000+0200},
author = {McRoberts, Adam J. and Bilitewski, Thomas and Haque, Masudul and Moessner, Roderich},
biburl = {https://www.bibsonomy.org/bibtex/220dcb54cb750f5d3dd461bf29b74755b/ctqmat},
day = 01,
doi = {10.1103/PhysRevLett.132.057202},
interhash = {41282ffa1696603c07cd6b108a5b983e},
intrahash = {20dcb54cb750f5d3dd461bf29b74755b},
journal = {Phys. Rev. Lett.},
keywords = {b},
month = {02},
number = 5,
numpages = {7},
pages = 057202,
publisher = {American Physical Society},
timestamp = {2024-04-26T15:04:08.000+0200},
title = {Domain wall dynamics in classical spin chains: free propagation, subdiffusive spreading, and soliton emission},
url = {https://link.aps.org/doi/10.1103/PhysRevLett.132.057202},
volume = 132,
year = 2024
}