4 papers
Instanton algebras and quantum 4-spheres
Ludwik Dabrowski, Giovanni Landi
We study some generalized instanton algebras which are required to describe `instantonic complex rank 2 bundles'. The spaces on which the bundles are defined are not prescribed fro…
Eigenvalues as Dynamical Variables
Giovanni Landi
We review some work done with C. Rovelli on the use of the eigenvalues of the Dirac operator on a curved spacetime as dynamical variables, the main motivation coming from their inv…
Deconstructing Monopoles and Instantons
Giovanni Landi
We give a unifying description of the Dirac monopole on the 2-sphere , of a graded monopole on a (2,2)-supersphere and of the BPST instanton on the 4-sphere , b…
Projective Systems of Noncommutative Lattices as a Pregeometric Substratum
Giovanni Landi, Fedele Lizzi
We present an approximation to topological spaces by {\it noncommutative} lattices. This approximation has a deep physical flavour based on the impossibility to fully localize part…