Asymptotic State Vector Collapse and QED Nonequivalent Representations

Details Asymptotic State Vector Collapse and QED Nonequivalent Representations Asymptotic State Vector Collapse and QED Nonequivalent Representations

1997-05-28

arxiv.org/abs/quant-ph/9705050v1

Int.J.Theor.Phys.37:401-409,1998

Physics

Quantum Physics

8 pages, Latex, Talk given at 'Quantum Structures -96' Conference To appear in Proceedings

Scientific paper

10.1023/A:1026695508031

The state vector evolution in the interaction of measured pure state with the collective quantum system or the field is analyzed in a nonperturbative QED formalism. As the model example the measurement of the electron final state scattered on nucleus or neutrino is considered. The produced electromagnetic bremsstrahlung contains the unrestricted number of soft photons resulting in the total radiation flux becoming the classical observable, which means the state vector collapse. The evolution from the initial to the final system state is nonunitary and formally irreversible in the limit of the infinite time.

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