Downloads: 133

Files in This Item:
File Description SizeFormat 
PhysRevE.92.032109.pdf610.12 kBAdobe PDFView/Open
Full metadata record
DC FieldValueLanguage
dc.contributor.authorYamaguchi, Yoshiyuki Y.ja
dc.contributor.alternative山口, 義幸ja
dc.description.abstractWe investigate the response to an external magnetic field in the Hamiltonian mean-field model, which is a paradigmatic toy model of a ferromagnetic body and consists of plane rotators like XY spins. Due to long-range interactions, the external field drives the system to a long-lasting quasistationary state before reaching thermal equilibrium, and the susceptibility tensor obtained in the quasistationary state is predicted by a linear response theory based on the Vlasov equation. For spatially homogeneous stable states, whose momentum distributions are asymmetric with 0 means, the theory reveals that the susceptibility tensor for an asymptotically constant external field is neither symmetric nor diagonalizable, and the predicted states are not stationary accordingly. Moreover, the tensor has no divergence even at the stability threshold. These theoretical findings are confirmed by direct numerical simulations of the Vlasov equation for skew-normal distribution functions.ja
dc.publisherAmerican Physical Societyja
dc.rights©2015 American Physical Society.ja
dc.titleNondiagonalizable and nondivergent susceptibility tensor in the Hamiltonian mean-field model with asymmetric momentum distributionsja
dc.type.niitypeJournal Articleja
dc.identifier.jtitlePhysical Review Eja
Appears in Collections:Journal Articles

Show simple item record

Export to RefWorks

Export Format: 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.