Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-03-07
Braz.J.Phys. 35, 2A (2005) 343
Physics
High Energy Physics
High Energy Physics - Theory
8 pages, RevTeX. Based on talk at DICE2004, Piombino (Italy), September 1-4, 2004. -- To appear in Brazilian Journal of Physic
Scientific paper
A quantum field theory is described which is a supersymmetric classical model. -- Supersymmetry generators of the system are used to split its Liouville operator into two contributions, with positive and negative spectrum, respectively. The unstable negative part is eliminated by a positivity constraint on physical states, which is invariant under the classical Hamiltonian flow. In this way, the classical Liouville equation becomes a functional Schroedinger equation of a genuine quantum field theory. Thus, 't Hooft's proposal to reconstruct quantum theory as emergent from an underlying deterministic system, is realized here for a field theory. Quantization is intimately related to the constraint, which selects the part of Hilbert space where the Hamilton operator is positive. This is seen as dynamical symmetry breaking in a suitably extended model, depending on a mass scale which discriminates classical dynamics beneath from emergent quantum mechanical behaviour.
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