Critical behavior of quantum magnets with long-range interactions in the thermodynamic limit

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Fey S, Schmidt KP
Zeitschrift: Physical Review B
Verlag: AMER PHYSICAL SOC
Jahr der Veröffentlichung: 2016
Band: 94
Heftnummer: 7
ISSN: 2469-9950
Sprache: Englisch


Abstract


Quasiparticle properties of quantum magnets with long-range interactions are investigated by high-order linked-cluster expansions in the thermodynamic limit. It is established that perturbative continuous unitary transformations on white graphs are a promising and flexible approach to treat long-range interactions in quantum many-body systems. We exemplify this scheme for the one-dimensional transverse-field Ising chain with long-range interactions. For this model, the elementary quasiparticle gap is determined allowing to access the quantum-critical regime including critical exponents and multiplicative logarithmic corrections for the ferroand antiferromagnetic case.



FAU-Autoren / FAU-Herausgeber

Fey, Sebastian
Lehrstuhl für Theoretische Physik
Schmidt, Kai Phillip Prof. Dr.
Professur für Theoretische Physik


Zitierweisen

APA:
Fey, S., & Schmidt, K.P. (2016). Critical behavior of quantum magnets with long-range interactions in the thermodynamic limit. Physical Review B, 94(7). https://dx.doi.org/10.1103/PhysRevB.94.075156

MLA:
Fey, Sebastian, and Kai Phillip Schmidt. "Critical behavior of quantum magnets with long-range interactions in the thermodynamic limit." Physical Review B 94.7 (2016).

BibTeX: 

Zuletzt aktualisiert 2019-18-03 um 10:02