Regensburg 2013 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 37: Transport: Quantum dots, wires, point contacts 3 (TT, jointly with HL)
HL 37.10: Talk
Tuesday, March 12, 2013, 12:15–12:30, H20
Coherence and indistinguishability of single electron wavepackets emitted by independent sources — Erwann Bocquillon1, Vincent Freulon1, Jean-Marc Berroir1, Pascal Degiovanni2, Bernard Plaçais1, Antonella Cavanna3, Yong Jin3, and •Gwendal Feve1 — 1Laboratoire Pierre Aigrain, Ecole Normale Supérieure, Paris, France — 2Laboratoire de Physique de l Ecole Normale Supérieure de Lyon, Lyon, France — 3Laboratoire de Photonique et Nanostructures, Marcoussis, France
Using two independent on-demand electron sources [1], two single-electron wavepackets are emitted on one-dimensional chiral edge channel located at at different inputs of an electronic beamsplitter. Whereas classical particles would be randomly partitioned by the splitter, we observe two-particle interferences resulting from quantum exchange in this electronic analog [2,3] of the optical Hong-Ou-Mandel [4] experiment. Both electrons, emitted in indistinguishable wavepackets with synchronized arrival time on the splitter, exit in different outputs as recorded by the low frequency current noise. Full random partitioning is recovered when the arrival of one electron is delayed with respect to the other. This two-electron interference experiment demonstrates the possibility to generate on-demand coherent and indistinguishable single-electron wavepackets in a quantum conductor.
[1] G. Fève et al., Science 316, 1169 (2007)
Ol’khovskaya et al., Phys. Rev. Lett. 101, 166802 (2008)
T. Jonckheere et al., Phys. Rev. B 86, 125425 (2012)
C. K. Hong et al., Phys. Rev. Lett. 59, 2044 (1987)