Quantum Critical Points in Quantum Impurity Systems
强关联电子
2009-11-10 v1 统计力学
摘要
The numerical renormalization group method is used to investigate zero temperature phase transitions in quantum impurity systems, in particular in the soft-gap Anderson model, where an impurity couples to a non-trivial fermionic bath. In this case, zero temperature phase transitions occur between two different phases whose fixed points can be built up of non-interacting single-particle states. However, the quantum critical point cannot be described by non-interacting fermionic or bosonic excitations.
引用
@article{arxiv.cond-mat/0406557,
title = {Quantum Critical Points in Quantum Impurity Systems},
author = {H. -J. Lee and R. Bulla},
journal= {arXiv preprint arXiv:cond-mat/0406557},
year = {2009}
}
备注
2 pages, 3 figures, submitted to SCES'04