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Diagonalization-free implementation of spin relaxation theory for large spin systems
NMR EPR relaxation simulation spin dynamics
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2011/3/1
The Liouville space spin relaxation theory equations are reformulated in such a way as to avoid the computationally expensive Hamiltonian diagonalization step, replacing it by numerical evaluation of ...
Absence of magnetism in continuous-spin systems with long-range antialigning forces
magnetism continuous-spin systems long-range antialigning forces
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2010/11/12
We consider continuous-spin models on the $d$-dimensional hypercubic lattice with the spins $\sigma_x$ \emph{a priori} uniformly distributed over the unit sphere in $\R^n$ (with $n\ge2$) and the inter...
Equivariant quantization of spin systems
conformal geometry pseudomechanics spin geometry equivariant quantization
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2010/12/3
We investigate the geometric and conformally equivariant quantizations of the supercotangent
bundle of a pseudo-Riemannian manifold (M,g), which is a model for the phase space of a classical spin par...
Ruelle-Lanford functions for quantum spin systems
Ruelle-Lanford functions r quantum spin systems
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2010/12/10
We prove a large deviation principle for the expectation of macroscopic observables in quantum (and classical) Gibbs states. Our proof is based on Ruelle-Lanford functions [20, 34] and direct subaddit...