Ground State of the Asymmetric Anderson Model
نویسندگان
چکیده
منابع مشابه
Ground-state properties of the periodic Anderson model.
The ground state energy, hybridization matrix element, local moment and spin density correlations of a one dimensional, finite chain periodic symmetric Anderson model are obtained using numerical simulations and compared with perturbation theory and strong coupling results. We find that the local f-electron spins are compensated by correlation with other f-electrons as well as band electrons le...
متن کاملAdiabatic connection between the RVB State and the ground state of the half filled periodic Anderson model
A one-parameter family of models that interpolates between the periodic A nderson model with infinite repulsion at half-filling and a model whose ground state is exactly the Resonating-Valence-Bond state is studied. It is shown numerically that the excitation gap does not collapse. Therefore the ground states of the two models are adiabatically connected.
متن کاملThe asymmetric single - impurity Anderson model – the modified perturbation theory
——————————————————————————————————————— Abstract We investigate the single-impurity Anderson model by means of the recently introduced modified perturbation theory. This approximation scheme yields reasonable results away from the symmetric case. The agreement with exactly known results for the symmetric case is checked, and results for the non-symmetric case are presented. With decreasing cond...
متن کاملthe use of appropriate madm model for ranking the vendors of mci equipments using fuzzy approach
abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...
15 صفحه اولAsymmetric Diffusion and the Enrgy Gap above the 111 Ground State of the Quantum Xxz Model
We consider the anisotropic three dimensional XXZ Heisenberg ferromagnet in a cylinder with axis along the 111 direction and boundary conditions that induce ground states describing an interface orthogonal to the cylinder axis. Let L be the linear size of the basis of the cylinder. Because of the breaking of the continuous symmetry around the ^ z axis, the Goldstone theorem implies that the spe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress of Theoretical Physics Supplement
سال: 2013
ISSN: 0375-9687
DOI: 10.1143/ptp.69.232