77 citations · 153 across the 5 of their papers we have counts for
7 papers
A perturbative approach to J mixing in f-electron systems: Application to actinide dioxides
N. Magnani, P. Santini, G. Amoretti +1
We present a perturbative model for crystal-field calculations, which keeps into account the possible mixing of states labelled by different quantum number J. Analytical J-mixing r…
Integrable lattices and their sub-lattices: from the discrete Moutard (discrete Cauchy-Riemann) 4-point equation to the self-adjoint 5-point scheme
A. Doliwa, P. Grinevich, M. Nieszporski +1
We introduce the sub-lattice approach, a procedure to generate, from a given integrable lattice, a sub-lattice which inherits its integrability features. We consider, as illustrati…
S-mixing and quantum tunneling of the magnetization in molecular nanomagnets
S. Carretta, E. Liviotti, N. Magnani +2
The role of -mixing in the quantum tunneling of the magnetization in nanomagnets has been investigated. We show that the effect on the tunneling frequency is huge and that the d…
The self-adjoint 5-point and 7-point difference operators, the associated Dirichlet problems, Darboux transformations and Lelieuvre formulas
Maciej Nieszporski, Paolo Maria Santini
We present some basic properties of two distinguished discretizations of elliptic operators: the self-adjoint 5-point and 7-point schemes on a two dimensional lattice. We first sho…
Macroscopic evidence of quantum coherent oscillations of the total spin in the Mn-[3x3] molecular nanomagnet
S. Carretta, P. Santini, E. Liviotti +4
Molecular nanomagnets, besides promising to open new frontiers in technology, have attracted huge interest in the scientific community because they can exhibit the phenomenon known…
The integrable discretization of the Bianchi-Ernst system
M. Nieszporski, A. Doliwa, P. M. Santini
We present the constraint for the discrete Moutard equation which gives the integrable discretization of the Bianchi-Ernst system. We also derive the discrete analogue of the Bianc…