Why are macroscopic experiments reproducible? Imitating the behavior of an ensemble by single pure states

Reimann P, Gemmer J (2020)
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 552: 121840.

Zeitschriftenaufsatz | E-Veröff. vor dem Druck | Englisch
 
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Autor*in
Reimann, PeterUniBi; Gemmer, Jochen
Abstract / Bemerkung
Evidently, physical experiments are practically reproducible even though the fully identical preparation of initial state wave functions is often far beyond experimental possibilities. It is thus natural to explore if and in which sense specific, uncontrollable features of initial wave functions are irrelevant for the observable course of an experiment. To this end we define ensembles of pure states which are then shown to generate extremely similar non-equilibrium dynamics of the expectation values of practically all standard observables. The ensembles are constructed to comply with some reduced, coarse a priori information on the state of the system, like, e.g. a few specific expectation values, etc. However, different types of ensembles with different additional properties are possible. We discuss some of them. (C) 2019 Elsevier B.V. All rights reserved.
Stichworte
Thermalization; Equilibration; Typicality
Erscheinungsjahr
2020
Zeitschriftentitel
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
Band
552
Art.-Nr.
121840
ISSN
0378-4371
eISSN
1873-2119
Page URI
https://pub.uni-bielefeld.de/record/2944185

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Reimann P, Gemmer J. Why are macroscopic experiments reproducible? Imitating the behavior of an ensemble by single pure states. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS. 2020;552: 121840.
Reimann, P., & Gemmer, J. (2020). Why are macroscopic experiments reproducible? Imitating the behavior of an ensemble by single pure states. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 552, 121840. doi:10.1016/j.physa.2019.121840
Reimann, P., and Gemmer, J. (2020). Why are macroscopic experiments reproducible? Imitating the behavior of an ensemble by single pure states. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 552:121840.
Reimann, P., & Gemmer, J., 2020. Why are macroscopic experiments reproducible? Imitating the behavior of an ensemble by single pure states. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 552: 121840.
P. Reimann and J. Gemmer, “Why are macroscopic experiments reproducible? Imitating the behavior of an ensemble by single pure states”, PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, vol. 552, 2020, : 121840.
Reimann, P., Gemmer, J.: Why are macroscopic experiments reproducible? Imitating the behavior of an ensemble by single pure states. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS. 552, : 121840 (2020).
Reimann, Peter, and Gemmer, Jochen. “Why are macroscopic experiments reproducible? Imitating the behavior of an ensemble by single pure states”. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 552 (2020): 121840.