36 citations · 142 across the 19 of their papers we have counts for
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Notions of Infinity in Quantum Physics
Fernando Lledó, Diego Martínez
In this article we will review some notions of infiniteness that appear in Hilbert space operators and operator algebras. These include proper infiniteness, Murray von Neumann's cl…
Existence of spectral gaps, covering manifolds and residually finite groups
Fernando Lledó, Olaf Post
In the present paper we consider Riemannian coverings with residually finite covering group and compact base space . In particular, we give two general…
Generating spectral gaps by geometry
Fernando Lledó, Olaf Post
Motivated by the analysis of Schrödinger operators with periodic potentials we consider the following abstract situation: Let be the Laplacian on a non-compact Riemannian cov…
Twisted duality of the CAR-Algebra
Hellmut Baumgärtel, Matthias Jurke, Fernando Lledó
We give a complete proof of the twisted duality property M(q)'= Z M(q^\perp) Z* of the (self-dual) CAR-Algebra in any Fock representation. The proof is based on the natural Halmos…