Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Sebastian Duffe"'
Autor:
Götz S. Uhrig, Sebastian Duffe
Publikováno v:
The European Physical Journal B. 84:475-490
The hole-doped antiferromagnetic spin-\hbox{$\frac{1}{2}$}12 two-leg ladder is an important model system for the high-Tc superconductors based on cuprates. Using the technique of self-similar continuous unitary transformations we derive effective Ham
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c98bed8e7a3b38189993449099c3b96
https://doi.org/10.1140/epjb/e2011-20150-x
https://doi.org/10.1140/epjb/e2011-20150-x
Publikováno v:
physica status solidi (b). 244:2357-2361
If one wants to deal with strongly correlated electron lattice systems within dynamical mean field theory, one needs an impurity solver, i.e. a solution for the dynamics of the Anderson magnetic impurity problem. The most ambitious approach to that p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25e9f2c953125be554dea9ccc1968aef
https://doi.org/10.1002/pssb.200674637
https://doi.org/10.1002/pssb.200674637
Mapping complex problems to simpler effective models is a key tool in theoretical physics. One important example in the realm of strongly correlated fermionic systems is the mapping of the Hubbard model to a t-J model which is appropriate for the tre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d5a8f3e0708024462977f7fc21e1d1e
http://arxiv.org/abs/1008.0522
http://arxiv.org/abs/1008.0522
Sufficiently dimerized quantum antiferromagnets display elementary S=1 excitations, triplon quasiparticles, protected by a gap at low energies. At higher energies, the triplons may decay into two or more triplons. A strong enough magnetic field induc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9521bb33ff36c552ce61bc669dc88063
An improved generator for continuous unitary transformations is introduced to describe systems with unstable quasiparticles. Its general properties are derived and discussed. To illustrate this approach we investigate the asymmetric antiferromagnetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92323b43631492a8c39661c88836cb96