Abstract
Title: "A new approach to quantum measurement problem: cluster separability"
Abstract:
The paper describes a solution to the problem of quantum
measurement that has been proposed recently. The starting point is the known
fact that a literal understanding of the basic rule of quantum mechanics on
identical systems violates the cluster separation principle and so leads to
difficulties. A proposal due to Peres of how such difficulties could be
removed is developed and extended. In particular, cluster separability leads
to a locality requirement on observables and to the key notion of separation
status. Separation status of a microsystem is shown to change in preparation
and registration processes. These are changes of kinematic description rather
than of a dynamical trajectory and so more radical than 'collapse of the wave
function'. Textbook quantum mechanics does not provide any information of how
separation status changes run, hence new rules must be formulated. This
enables to satisfy the objectification requirement for registrations. To show
how the ideas work, a simplified model of registration apparatus is
constructed.