Continuous phase-space methods on discrete phase spaces
Author
dc.contributor.author
Zunkovic, Bojan
Admission date
dc.date.accessioned
2015-12-29T14:44:29Z
Available date
dc.date.available
2015-12-29T14:44:29Z
Publication date
dc.date.issued
2015
Cita de ítem
dc.identifier.citation
EPL, 112 (2015) 10003
en_US
Identifier
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DOI: 10.1209/0295-5075/112/10003
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/136027
General note
dc.description
Artículo de publicación ISI
en_US
Abstract
dc.description.abstract
We show that discrete quasiprobability distributions defined via the discrete
Heisenberg-Weyl group can be obtained as discretizations of the continuous SU(N) quasiprobability
distributions. This is done by identifying the phase-point operators with the continuous
quantisation kernels evaluated at special points of the phase space. As an application we discuss
the positive-P function and show that its discretization can be used to treat the problem of diverging
trajectories. We study the dissipative long-range transverse-field Ising chain and show that
the long-time dynamics of local observables is well described by a semiclassical approximation of
the interactions.