18 citations · 70 across the 8 of their papers we have counts for
8 papers
Image method in the calculation of the van der Waals force between an atom and a conducting surface
Reinaldo de Melo e Souza, W. J. M. Kort-Kamp, C. Sigaud +1
Initially, we make a detailed historical survey of van der Waals forces, collecting the main references on the subject. Then, we review a method recently proposed by Eberlein and Z…
Sommerfeld's image method in the calculation of van der Waals forces
Reinaldo de Melo e Souza, W. J. M. Kort-Kamp, C. Sigaud +1
We show how the image method can be used together with a recent method developed by C. Eberlein and R. Zietal to obtain the dispersive van der Waals interaction between an atom and…
Finite size effects and non-additivity in the van der Waals interaction
Reinaldo de Melo e Souza, W. J. M. Kort-Kamp, C. Sigaud +1
We obtain analytically the exact non-retarded dispersive interaction energy between an atom and a perfectly conducting disc. We consider the atom in the symmetry axis of the disc a…
On the finite spectral triple of an almost-commutative geometry
F. J. Vanhecke, A. R. da Silva, C. Sigaud
In this short communication, we examine the relevance of the signature of the space-time metric in the construction of the product of a pseudo-Riemannian spectral triple with a fin…
Symmetries in Non Commutative Configuration space
F. J. Vanhecke, C. Sigaud, A. R. da Silva
Extending earlier work(*), we examine the deformation of the canonical symplectic structure in a cotangent bundle $T^\star(\Q)$ by additional terms implying the Poisson non-commuta…
Noncommutative configuration space. Classical and quantum mechanical aspects
F. J. Vanhecke, C. Sigaud, A. R. da Silva
In this work we examine noncommutativity of position coordinates in classical symplectic mechanics and its quantisation. In coordinates the canonical symplectic two-f…
Connes-Lott model building on the two-sphere
J. A. Mignaco, C. Sigaud, A. R. da Silva +1
In this work we examine generalized Connes-Lott models on the two-sphere. The Hilbert space of the continuum spectral triple is taken as the space of sections of a twisted spinor b…
The Connes-Lott program on the sphere
J. A. Mignaco, C. Sigaud, A. R. da Silva +1
We describe the classical Schwinger model as a study of the projective modules over the algebra of complex-valued functions on the sphere. On these modules, classified by $π_2(S^2)…