Die u:cris Detailansicht:
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