Center for Interdisziplinary Research

Quantum Theory Without Observers II

Date: February 2 - 6, 2004
Scientific Organizers: Detlef Dürr (München), Phillipe Blanchard (Bielefeld), G.C. Ghirardi (Triest), S. Goldstein (New Brunswick), Tim Maudlin (New Brunswick)

The symposium Quantum Theory Without Observers II discusses those quantum theories in which observers and measurement devices or, more to the point, the notions of observable and measurement, are neither part of nor crucial for the very formulation of the theory. The most famous and established examples of such theories are Bohmian mechanics and spontaneous localization models, as well as decoherent histories. The problem of formulating a relativistic "quantum physics without observers" has been recently revived. One of the dominating difficulties is that of merging nonlocality with relativistic space time. This problem appears in various guises, arising either from Bell's inequalities or in more orthodox terms from the instantaneous collapse of the wavefunction. While these are by now well understood in nonrelativistic quantum theory, for relativistic quantum physics they present new and difficult challenges. The meeting will focuss on these challenges to set up the direction of future research.

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