Nonperturbative real-space renormalization group scheme for the spin-1/2 XXX Heisenberg model
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ICR Authors
Authors
Degenhard, A
Document Type
Journal Article
Date
2001-11-01
Date Accepted
Abstract
In this paper we apply an analytical real-space renormalization group formulation which is based on numerical concepts of the density-matrix renormalization group, Within a rigorous mathematical framework we construct nonperturbative renormalization group transformations for the spin-1/2 XXX Heisenberg model in the finite-temperature regime. The developed renormalization group scheme allows for calculating the renormalization group flow behavior in the temperature-dependent coupling constant. The constructed renormalization group transformations are applied within the ferromagnetic and the antiferromagnetic regime of the Heisenberg chain. The ferromagnetic fixed point is computed and compared to results derived by other techniques.
Citation
PHYSICAL REVIEW B, 2001, 64
Rights
Source Title
Publisher
AMER PHYSICAL SOC
ISSN
1098-0121
eISSN
1550-235X
Collections
Research Team
Magnetic Resonance