Real-time dynamics of open quantum spin systems driven by dissipative processes
Data(s) |
09/07/2015
|
---|---|
Resumo |
We study the real-time evolution of large open quantum spin systems in two spatial dimensions, whose dynamics is entirely driven by a dissipative coupling to the environment. We consider different dissipative processes and investigate the real-time evolution from an ordered phase of the Heisenberg or XY model towards a disordered phase at late times, disregarding unitary Hamiltonian dynamics. The corresponding Kossakowski-Lindblad equation is solved via an efficient cluster algorithm. We find that the symmetry of the dissipative process determines the time scales, which govern the approach towards a new equilibrium phase at late times. Most notably, we find a slow equilibration if the dissipative process conserves any of the magnetization Fourier modes. In these cases, the dynamics can be interpreted as a diffusion process of the conserved quantity. |
Formato |
application/pdf application/pdf |
Identificador |
http://boris.unibe.ch/71430/1/PhysRevB.92.035116.pdf http://boris.unibe.ch/71430/8/Post-Print_PRB92.035116.pdf Hebenstreit, Florian; Banerjee, Debasish; Hornung, Manes; Jiang, Fu-Jiun; Schranz, F.; Wiese, Uwe-Jens (2015). Real-time dynamics of open quantum spin systems driven by dissipative processes. Physical review. B - condensed matter and materials physics, 92(3) American Physical Society 10.1103/PhysRevB.92.035116 <http://dx.doi.org/10.1103/PhysRevB.92.035116> doi:10.7892/boris.71430 info:doi:10.1103/PhysRevB.92.035116 urn:issn:1098-0121 |
Idioma(s) |
eng |
Publicador |
American Physical Society |
Relação |
http://boris.unibe.ch/71430/ |
Direitos |
info:eu-repo/semantics/restrictedAccess info:eu-repo/semantics/openAccess |
Fonte |
Hebenstreit, Florian; Banerjee, Debasish; Hornung, Manes; Jiang, Fu-Jiun; Schranz, F.; Wiese, Uwe-Jens (2015). Real-time dynamics of open quantum spin systems driven by dissipative processes. Physical review. B - condensed matter and materials physics, 92(3) American Physical Society 10.1103/PhysRevB.92.035116 <http://dx.doi.org/10.1103/PhysRevB.92.035116> |
Palavras-Chave | #530 Physics |
Tipo |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed |