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TT: Fachverband Tiefe Temperaturen

TT 102: Transport: Quantum Dots, Quantum Wires, Point Contacts 2 (jointly with HL)

TT 102.4: Vortrag

Donnerstag, 19. März 2015, 15:45–16:00, A 053

Fractionalized double quantum wires — •Tobias Meng^1,2 and Eran Sela³ — ¹Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany — ²Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland — ³Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Tel Aviv, 69978, Israel

We discuss how electron-electron interactions can lead to novel phenomena in double quantum wire systems. Explicitly, we find that double wires with time reversal symmetry and strong electron-electron interactions can exhibit fractional conductances and cross-conductances in their normal state. They also allow to pump the fraction of a spin in their superconducting state. These effects are an extension of fractional helical Luttinger liquid physics, and can be understood as the one-dimensional cousins of bilayer fractional quantum Hall effects.