Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 58: Poster Session Transport & Matter at Low Temperature
TT 58.5: Poster
Donnerstag, 14. März 2013, 15:00–19:00, Poster D
Energy-charge separation in an electronic interferometer with two-particle collision — •Guillem Rosselló1, Mikhail Moskalets2, and Janine Splettstoesser1 — 1Institut für Theorie der Statistischen Physik, RWTH Aachen, Germany — 2Department of Metal and Semic. Physics, NTU "Kharkiv Polytechnical Institute", Ukraine
Quantum wave experiments with electrons were recently reported in mesoscopic devices in the quantum Hall regime, with quantum point contacts as beam splitters and unidirectional edge states as waveguides. They resemble quantum optics experiments but are based on fermions instead of bosons. An important further ingredient is a recently developed single-particle source [1], which permits to inject single particles in a controllable manner into an electronic circuit. This allows to address single-particle coherence properties as well as controlled two-particle exchange effects occurring as "collisions" between particles. On this poster a setup consisting of a Mach-Zehnder interferometer and two synchronized sources is presented, in which collisions of particles strongly influence - and in certain cases even suppress - the single-particle interference pattern [2]. In particular, the signatures occurring in the heat current and the noise are theoretically investigated, complementing the features occurring in the charge current. This study yields further insight into the particle-emission process and the impact of collisions on which-path information.
[1] G. Fève, et al., Science 316, 1169 (2007)
S. Juergens, J. Splettstoesser, and M. Moskalets, EPL 96, 37011 (2011)