Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 80: Graphene
TT 80.2: Vortrag
Donnerstag, 15. März 2018, 09:45–10:00, H 3005
Echoes of zitterbewegung in graphene — •Phillipp Reck1, Cosimo Gorini1, Arseni Goussev2, Viktor Krueckl1, and Klaus Richter1 — 1Institut für Theoretische Physik, Universität Regensburg, Germany — 2Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle Upon Tyne, UK
In the last decade, Zitterbewegung (ZB) – the trembling motion of (effectively) relativistic particles – has attracted the attention also in the solid state community [1], e.g. in graphene [2]. The advantage of solid state systems is the lower energy difference of particle- and antiparticle-like states that defines the frequency of the ZB, which is the reason for a supposedly easier experimental detection.
However, the ZB of a wave packet decays over time because of
the separation of the two sub-wave packets in the two bands and the according loss of interference.
On the other hand, Quantum Time Mirrors in graphene have been recently proposed to invert the motion of wave packets [3].
Here, we discuss the application of the Quantum Time Mirrors on the sub-wave packets after the ZB has decayed, which is supposed to make the separated sub-wave packets interfere again and accordingly, to create an echo of the ZB.
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P. Reck, C. Gorini, A. Goussev, V. Krueckl, M. Fink, K. Richter, Phys. Rev. B 95, 165421 (2017)