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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

Anzahl der Seiten

ISSN

1098-0121

DOI

https://doi.org/10.1103/PhysRevB.88.155116

Publikationsdatum

10-2013

Peer-reviewed

ÖFOS 2012

103015 Kondensierte Materie

Schlagwörter

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