Remarks concerning an Entropy-like Quantity $S_q$ especially for Quantum Systems with a Particle Picture; Model with pure Point Spectra
| dc.creator | Schlieder, S. | |
| dc.date | 1998-01-20 | |
| dc.date.accessioned | 2026-07-07T06:14:43Z | |
| dc.date.available | 2026-07-07T06:14:43Z | |
| dc.description | For quantum mechanical systems an entropy-like quantity $S_q$ is defined. $S_q$ can differ from the usually defined entropy $S$ and $S_q$ may increase with time for an isolated system. The essential condition for the difference between $S$ and $S_q$ is the assumption that the set {\bf A} of observables which can be represented by a measurement is a proper subset of the set of selfadjoint operators. The underlying idea is made visible in the case of particle systems with non-trivial scattering. The model-character of the reasoning comes from the fact that continuous spectra are replaced by point-spectra. So it seems evident, that no direct connection exists between $S_q$ and the Sinai-Kolmogorov-Entropy at least in this model with pure point-spectra. | |
| dc.description | 17 pages | |
| dc.identifier | https://arxiv.org/abs/quant-ph/9801040 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/9801040 | |
| dc.identifier | Nuovo Cim. B114 (1999) 1225-1238 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/93567 | |
| dc.subject | Quantum Physics | |
| dc.title | Remarks concerning an Entropy-like Quantity $S_q$ especially for Quantum Systems with a Particle Picture; Model with pure Point Spectra | |
| dc.type | text |