caa a22 4500 46906532X CHVBK 20180323132907.0 cr unu---uuuuu 170328e19920601xx s 000 0 eng 10.1007/BF02723174 doi (NATIONALLICENCE)springer-10.1007/BF02723174 Kobayashi T. Institute of Physics, University of Tsukuba, 305, Ibaraki, Japan aut Mechanisms of the wave-packet collapse and macroscopic limits in the quantum theory of measurement [Elektronische Daten] [T. Kobayashi] Summary: Mechanisms of the wave-packet collapse are studied by using the density matrix with the internal trace for detector variables. It is clarified that the simultaneous realization of the wave-packet collapse and the macroscopic property of the measured physical quantity in a macroscopic limit is important. It is also pointed out that another type of wave-packet collapse is possibly derived by the effect arising from the ambiguity involved in the initial state of the detector. This type of collapse does not describe the measurement process. However, this effect is unavoidable and derives the unsharpness of the experimental results in all measurements, then it is important in the precise analysis of the experimental results. The discrepancy of these effects from the real wave-packet collapse will be seen in the temperature dependence of measured quantities. Società Italiana di Fisica, 1992 03.65.Bz nationallicence Foundations nationallicence theory of measurement nationallicence miscellaneous theories nationallicence Il Nuovo Cimento B (1971-1996) Società Italiana di Fisica 107/6(1992-06-01), 657-667 107:6<657 1992 107 40764 https://doi.org/10.1007/BF02723174 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02723174 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kobayashi T. Institute of Physics, University of Tsukuba, 305, Ibaraki, Japan aut NATIONALLICENCE 773 0- Il Nuovo Cimento B (1971-1996) Società Italiana di Fisica 107/6(1992-06-01), 657-667 107:6<657 1992 107 40764 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer