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Heinz von Foerster 100
Organizing Institutions:
Heinz von Foerster Gesellschaft / Wien
ASC – American Society for Cybernetics
WISDOM – Wiener Institut für
  sozialwissenschaftliche Dokumentation und Methodik

Institut für Zeitgeschichte | Universität Wien
AINS – Austrian Institute for Nonlinear Studies
Lajos Diósi

Coexistence of classical continuum and quantum theory

Research Institute for Particle and Nuclear Physics
Budapest, Hungary

Von Neumann's statistical theory of quantum measurement yields the interpretation of the instantaneous quantum state in terms of instantaneous classical variables. In realty, quantum states and classical variables coexist and can influence each other in a time-continuous way. This has been motivating independent investigations since longtime in quite different fields from quantum cosmology to optics as well as in foundations of course. Different and independent theories (mean-field, Bohm, decoherence, dynamical collapse, continuous measurement, hybrid dynamics, e.t.c.) emerged for what I collectively designate as "coexistence of classical continuum with quantum". I compare the proposals and, in particular, I apply a sort of "free will" test to them.


b. June 16, 1950, Gyula, Hungary
scientific advisor (Hungarian Academy of Sciences)
private professor (Eötvös University)
Office: Research Institute for Particle & Nuclear Physics (1973-)
2007 Dr.Habil. (Eötvös University)
1976 Ph.D. (Eötvös University)
1973 M.Sc. (Eötvös University)
Honours, memberships:
2011 MC, COST Action Fundamental Problems in Quantum Physics
2008 Editorial Advisory Board, The Open Nuclear & Particle Physics Journal
2008 Lady Davies Visiting Professorship (Technion, Israel)
1999 Institute for Advanced Study (Berlin, Wissenschaftskolleg)
1997 Visiting Professor (QMW College, London University)
Research Interests:
Foundations of quantum theory
Quantum information theory
Open quantum systems