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Quantum Fields as Operator Valued Distributions and Causality
Quantum Field Theory with fields as Operator Valued Distributions with adequate test functions, -the basis of Epstein-Glaser approach known now as Causal Perturbation Theory-, is recalled. Its recentExpand
On the role of entanglement in Schrödinger’s cat paradox
In this paper we re-investigate the core of Schrödinger’s “cat paradox”. We argue that one has to distinguish clearly between superpositions of macroscopic cat states |☺〉 + |☹〉 and superpositions ofExpand
Nonclassical interference effects in the radiation from coherently driven uncorrelated atoms
We demonstrate the existence of nonclassical correlations in the radiation of two atoms, that are coherently driven by a continuous laser source. The photon-photon correlations of the fluorescenceExpand
Nonperturbative light cone quantum field theory beyond the tree level
We demonstrate the appearance of spontaneous symmetry breaking induced by nonperturbative quantum corrections for scalar light cone quantum field theory in 1+1 dimensions. We define a light coneExpand
Spontaneous symmetry breaking in light cone quantum field theory
Abstract We reexamine light cone quantisation of scalar field theories with a spontaneously broken internal symmetry. To this end we use the Dirac-Bergmann algorithm for quantisation of constrainedExpand
Chiral symmetry breaking, confining potentials and the Goldstone pion
Abstract The equivalent of the Nambu and Jona-Lasinio chiral breaking scheme has been derived for hadrons with relativistic quarks moving in a confining potential. As a result one obtains aExpand
Non-trivial vacuum structure in light-cone quantum field theory
Abstract By modifying the Dirac-Bergmann algorithm for the quantisation of constrained systems we solve the massless Schwinger model quantised on a lightlike hyperplane. We obtain a nontrivial θ-typeExpand
The fermionic Schwinger model in light cone quantisation
Abstract We discuss the light cone approach to the fermionic Schwinger model. As this approach necessarily involves constraints, we use the Dirac-Bergmann algorithm to obtain the quantum theory fromExpand
Broken phase of the O( N) φ 4 ) model in light cone quantization and {1}/{N} expansion
Abstract The solution of the O(N) φ4 scalar field theory in the broken phase is given in the framework of light cone quantization and a 1 N expansion. It involves the successive building of operatorExpand
The goldstone pion and the quark-antiquark pion: (I). Pion mass and strength function
Abstract The connection between the pion as a Goldstone boson related to spontaneous chiral symmetry breaking and the quark-antiquark structure of the pion is investigated with a chiral effectiveExpand