A Spin-Spin Interaction Model of Disordered Octahedra in Superconducting Bismuthate

Author(s):  
S. Haldar ◽  
Ajay Kumar Ghosh
2004 ◽  
Vol 18 (04n05) ◽  
pp. 773-784
Author(s):  
M. TALAGRAND

We study the magnetization of the pure states in (a suitable version of) the p-spin interaction model at low temperature. We give a rigorous proof of the phenomenon, discovered in 1 that (very roughly speaking), at a given level of accuracy, the set of sites decomposes in a finite number of cells on which the magnetization of any different pure states are uncorrelated.


Author(s):  
AKITO SUZUKI

We consider a scaling limit of the Hamiltonian of the generalized spin-boson (GSB) model which is an abstract quantum field theoretical model of particles interacting with a Bose field. Applying it to a Hamiltonian of the field of the nuclear force with isospin, we obtain an effective potential of the interaction between nucleons. Also, we discuss an application to a Hamiltonian of a lattice spin system interacting with a Bose field and obtain a spin–spin interaction in the vacuum of the Bose field. An interaction model between a Fermi field and a Bose field yields an interaction in the vacuum of the Bose field.


2004 ◽  
Vol 21 (4) ◽  
pp. 311-362 ◽  
Author(s):  
Xavier Bardina ◽  
David Márquez-Carreras ◽  
Carles Rovira ◽  
Samy Tindel

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