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Concerning the state‐change due to the measurement process
Author(s) -
Lüders G.
Publication year - 2006
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.200610207
Subject(s) - euclidean geometry , schwarzschild radius , schwarzschild metric , metric (unit) , instanton , laplace operator , operator (biology) , infinity , physics , mathematical physics , pure mathematics , mathematics , theoretical physics , mathematical analysis , quantum mechanics , geometry , gravitation , economics , biochemistry , chemistry , repressor , transcription factor , gene , operations management , general relativity
The statistical transformation theory contains procedures for the computation of measurement probabilities, but requires for its completion a statement about the state‐change due to the measurement process. We discuss and reject an ansatz suggested for this by J. von Neumann. We submit an ansatz for the state‐change which is essentially identical to the ‘reduction of the wave function’. It permits a deepening of the concept of compatibility of measurements. Finally, measurements of states subject to con straints are considered.