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Variational matrix product ansatz for nonuniform dynamics in the thermodynamic limit

Autor(en)
Ashley Milsted, Jutho Haegeman, Tobias J. Osborne, Frank Verstraete
Abstrakt

We describe how to implement the time-dependent variational principle

for matrix product states in the thermodynamic limit for nonuniform

lattice systems. This is achieved by confining the nonuniformity to a

(dynamically expandable) finite region with fixed boundary conditions.

The suppression of nonphysical quasiparticle reflections from the

boundary of the nonuniform region is also discussed. Using this

algorithm we study the dynamics of localized excitations in infinite

systems, which we illustrate in the case of the spin-1 antiferromagnetic

Heisenberg model and the ϕ4 model.

Organisation(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
Gottfried Wilhelm Leibniz Universität Hannover
Journal
Physical Review B
Band
88
Anzahl der Seiten
8
ISSN
1098-0121
DOI
https://doi.org/10.1103/PhysRevB.88.155116
Publikationsdatum
10-2013
Peer-reviewed
Ja
ÖFOS 2012
103015 Kondensierte Materie
Schlagwörter
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/6c6890a6-abe9-487b-a25a-d460b575491d