From the 1 of 8 linked papers with an AI index.
8 papers
Quantum orientation, Noether structure, composition of systems and operations
Heinz-Jürgen Schmidt
The paper introduces a "Noether structure"—the dual role of Hermitian operators as observables and symmetry generators—to complement the statistical framework of quantum theory, sh…
A generalization of the Choi isomorphism with application to open quantum systems
Heinz-Jürgen Schmidt
Completely positive transformations play an important role in the description of state changes in quantum mechanics, including the time evolution of open quantum systems. One usefu…
On the motion of a point charge in a plate capacitor considering influence effects
Heinz-Jürgen Schmidt, Thomas Bröcker
A point charge between the plates of a capacitor generates an influence charge distribution on the plates that modify the electric field acting upon the point charge. This effect i…
Ground states of classical spin polygons: Rigorous results and examples
Wojciech Florek, Heinz-Jürgen Schmidt, Katarzyna JaÅniewicz-Pacer
We present a comprehensive and rigorous analysis of the lowest energy configurations (LECs) of classical spin polygons characterized by arbitrary couplings between neighboring spin…
Coarse-grained entropy balance of the Szilard engine
Heinz-Jürgen Schmidt, Thomas Bröcker
In order to reconcile the entropy reduction of a system through external interventions that are linked to a measurement with the second law of thermodynamics, there are two main pr…
Species of structure and physical dimensions
Heinz-Jürgen Schmidt
This study addresses the often underestimated importance of physical dimensions and units in the formal reconstruction of physical theories, focusing on structuralist approaches th…