Dresden 2011 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Quantum Chaos I

DY 29.2: Vortrag

Donnerstag, 17. März 2011, 10:30–10:45, ZEU 255

Phase-Space Properties of a Classical Non-Harmonic Two-Electron Quantum Dot — •Moritz Schönwetter, Javier Madroñero, Sebastian Schröter, and Johannes Eiglsperger — Physik Department, Technische Universität München, James-Franck-Str. 1, D-85748 Garching

Recent investigations of the fidelity in many body systems – which include trapped BEC [1], many electrons in nonparabolic quantum wells [2], and electron gases [3] – have shown an unusual behaviour of the quantum fidelity: it stays equal to unity until a critical time, then drops suddenly to much lower values. In order to understand the origin of this phenomenom the dynamics of a non-harmonic two-electron quantum dot is investigated. We present our first results in an attempt to characterize the coherence of this system in terms of the underlying mixed regular-chaotic classical dynamics.

[1] G.  Manfredi, P.-A.  Hervieux, Phys. Rev. Lett. 100 (2008), 050405.

[2] G.  Manfredi, P.-A.  Hervieux, New J. Phys. 11 (2009), 013050.

[3] G.  Manfredi, P.-A.  Hervieux, Phys. Rev. Lett. 97 (2006), 190404.