Browsing Research publications by Author "Kakofengitis, Dimitris"
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Anharmonic quantum mechanical systems do not feature phase space trajectories
Oliva, Maxime; Kakofengitis, Dimitris; Steuernagel, Ole (2018-07-15)Phase space dynamics in classical mechanics is described by transport along trajectories. Anharmonic quantum mechanical systems do not allow for a trajectory-based description of their phase space dynamics. This invalidates ... -
Wigner flow reveals topological order in quantum phase space dynamics
Steuernagel, Ole; Kakofengitis, Dimitris; Ritter, Georg (2013-01)The behaviour of classical mechanical systems is characterised by their phase portraits, the collections of their trajectories. Heisenberg's uncertainty principle precludes the existence of sharply defned trajectories, ... -
Wigner's quantum phase space current in weakly anharmonic weakly excited two-state systems
Kakofengitis, Dimitris; Steuernagel, Ole (2017-09-30)There are no phase-space trajectories for anharmonic quantum systems, but Wigner’s phase-space representation of quantum mechanics features Wigner current J . This current reveals fine details of quantum dynamics – finer ... -
Wigner's representation of quantum mechanics in integral form and its applications
Kakofengitis, Dimitris; Oliva, Maxime; Steuernagel, Ole (2017-02-27)We consider quantum phase space dynamics using the Wigner representation of quantum mechanics. We stress the usefulness of the integral form for the description of Wigner's phase space current~$\bm J$ as an alternative to ...