Albrecht, I.; Herrmann, J.; Mariani, A.; Wiese, U.-J.; Wyss, V. (2023). Bouncing wave packets, Ehrenfest theorem, and uncertainty relation based upon a new concept for the momentum of a particle in a box. Annals of physics, 452, p. 169289. Elsevier 10.1016/j.aop.2023.169289
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For a particle in a box, the operator
is not self-adjoint and thus does not qualify as the physical momentum. As a result, in general the Ehrenfest theorem is violated. Based upon a recently developed new concept for a self-adjoint momentum operator, we reconsider the theorem and find that it is now indeed satisfied for all physically admissible boundary conditions. We illustrate these results for bouncing wave packets which first spread, then shrink, and return to their original form after a certain revival time. We derive a very simple form of the general Heisenberg–Robertson–Schrödinger uncertainty relation and show that our construction also provides a physical interpretation for it.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Mariani, Alessandro, Wiese, Uwe-Jens, Wyss, Valentin |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0003-4916 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Franziska Stämpfli |
Date Deposited: |
01 Dec 2023 11:25 |
Last Modified: |
03 Dec 2023 02:31 |
Publisher DOI: |
10.1016/j.aop.2023.169289 |
BORIS DOI: |
10.48350/189378 |
URI: |
https://boris.unibe.ch/id/eprint/189378 |
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