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By Erich Joos

A exact description of the phenomena that come up from the interplay among quantum platforms and their surroundings. as a result of novel personality of the process mentioned, the e-book addresses scientists from all fields of physics and comparable disciplines in addition to scholars of physics.

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Of course, such a collapse must not be interpreted simply as only representing increasing knowledge. The assumed collapse does not change the (dynamics of) the local density matrix, if the result is not observed. Therefore, the ensemble of all "quantum trajectories" must exactly reproduce the conventionally calculated density matrix (which in most cases follows a Lindblad master equation) by construction. This is in line with the well-known fact that quantum correlations cannot be used to transmit signals.

A similar proposal has recently been put forward under the name "modal interpretation" (cf. Dieks 1995). D. Zeh As already explained in Sect. 3, both claims miss the point. However, decoherence represents an essential dynamical step in the measurement process. The rest may even remain a pure epistemological problem (requiring only a reformulation of the psycho-physical parallelism). Every time dependence of a density matrix p, for example according to a von Neumann equation, induces a time dependence of its coarse-grained projection - similar to the motion of a shadow that merely reflects the motion of its source.

A similar proposal has recently been put forward under the name "modal interpretation" (cf. Dieks 1995). D. Zeh As already explained in Sect. 3, both claims miss the point. However, decoherence represents an essential dynamical step in the measurement process. The rest may even remain a pure epistemological problem (requiring only a reformulation of the psycho-physical parallelism). Every time dependence of a density matrix p, for example according to a von Neumann equation, induces a time dependence of its coarse-grained projection - similar to the motion of a shadow that merely reflects the motion of its source.

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