For an isolated macrosystem classical state parameters zeta (t) are introduced inside a quantum mechanical treatment. By a suitable mathematical representation of the actual preparation procedure in the time interval [T,t(0)] a statistical operator is constructed as a solution of the Liouville-von Neumann equation, exhibiting at time t the state parameters zeta (t'), t(0) less than or equal to t' less than or equal to t, and preparation parameters related to times T less than or equal to t' less than or equal to t(0). Relation with Zubarev's nonequilibrium statistical operator is discussed. A mechanism for memory loss is investigated and time evolution by a semigroup is obtained for a restricted set of relevant observables, slowly varying on a suitable time scale.
Description of isolated macroscopic systems inside quantum mechanics / L. Lanz, O. Melsheimer, B. Vacchini. - In: REPORTS ON MATHEMATICAL PHYSICS. - ISSN 0034-4877. - 46:1-2(2000), pp. 191-202.
Titolo: | Description of isolated macroscopic systems inside quantum mechanics |
Autori: | LANZ, LODOVICO GIOVANNI (Primo) VACCHINI, BASSANO MARIA (Ultimo) |
Settore Scientifico Disciplinare: | Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici |
Data di pubblicazione: | 2000 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/S0034-4877(01)80023-9 |
Appare nelle tipologie: | 01 - Articolo su periodico |
File in questo prodotto:
File | Descrizione | Tipologia | Licenza | |
---|---|---|---|---|
1-s2.0-S0034487701800239-main.pdf | Pre-print (manoscritto inviato all'editore) | Open Access Visualizza/Apri |