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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 recent… Expand

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 of… Expand

Nonclassical interference effects in the radiation from coherently driven uncorrelated atoms

- C. Skornia, J. V. Zanthier, +11 authors India.
- Physics
- 7 March 2001

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 fluorescence… Expand

Nonperturbative light cone quantum field theory beyond the tree level

- T. Heinzl, S. Krusche, S. Simbürger, E. Werner
- Physics
- 13 July 1992

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 cone… Expand

Spontaneous symmetry breaking in light cone quantum field theory

- T. Heinzl, S. Krusche, E. Werner
- Physics
- 28 November 1991

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 constrained… Expand

Chiral symmetry breaking, confining potentials and the Goldstone pion

- R. Brockmann, W. Weise, E. Werner
- Physics
- 10 March 1983

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 a… Expand

Non-trivial vacuum structure in light-cone quantum field theory

- T. Heinzl, S. Krusche, E. Werner
- Physics
- 28 February 1991

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-type… Expand

The fermionic Schwinger model in light cone quantisation

- T. Heinzl, S. Krusche, E. Werner
- Physics
- 30 January 1992

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 from… Expand

Broken phase of the O( N) φ 4 ) model in light cone quantization and {1}/{N} expansion

- A.Borderies, P. Grang'e, E. Werner
- Physics
- 12 December 1994

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 operator… Expand

The goldstone pion and the quark-antiquark pion: (I). Pion mass and strength function

- V. Bernard, R. Brockmann, M. Schaden, W. Weise, E. Werner
- Physics
- 16 January 1984

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 effective… Expand

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