11 citations · 35 across the 11 of their papers we have counts for
11 papers
Canonical transformations for fermions in superanalysis
Joachim Kupsch
Canonical transformations (Bogoliubov transformations) for fermions with an infinite number of degrees of freedom are studied within a calculus of superanalysis. A continuous repre…
Towards the saturation of the Froissart bound
Joachim Kupsch
It is the aim of this paper to summarize results about the construction of amplitudes, which rigorously satisfy Mandelstam analyticity, crossing symmetry, and (at least partly) the…
Applications of Canonical Transformations
Subhashish Banerjee, Joachim Kupsch
Canonical transformations are defined and discussed along with the exponential, the coherent and the ultracoherent vectors. It is shown that the single-mode and the -mode squeez…
Ultracoherence and Canonical Transformations
Joachim Kupsch, Subhashish Banerjee
The (in)finite dimensional symplectic group of homogeneous canonical transformations is represented on the bosonic Fock space by the action of the group on the ultracoherent vector…
Superselection rules induced by infrared divergence
Joachim Kupsch
Superselection rules induced by the interaction with a mass zero Boson field are investigated for a class of exactly soluble Hamiltonian models. The calculations apply as well to d…
Decoherence and infrared divergence
Joachim Kupsch
The dynamics of a particle which is linearly coupled to a boson field is investigated. The boson field induces superselection rules for the momentum of the particle, if the field i…