Simulation of quantum many-body systems with strings of operators and Monte Carlo tensor contractions

Autor(en)

Norbert Schuch, Michael M. Wolf, Frank Verstraete, J. Ignacio Cirac

Abstrakt

We introduce string-bond states, a class of states obtained by placing strings of operators on a lattice, which encompasses the relevant states in quantum information. For string-bond states, expectation values of local observables can be computed efficiently using Monte Carlo sampling, making them suitable for a variational algorithm which extends the density matrix renormalization group to higher dimensional and irregular systems. Numerical results demonstrate the applicability of these states to the simulation of many-body systems.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Max-Planck-Institut für Quantenoptik

Journal

Physical Review Letters

Band

100

Anzahl der Seiten

4

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.100.040501

Publikationsdatum

02-2008

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/d91c4457-b5c6-43b3-b34d-f048af631af6