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Bocquillon, E.; Freulon, V.; Berroir, J.-M; Degiovanni, P.; Plaçais, B.; Cavanna, A.; Jin, Y.; Fève, G.
Science (American Association for the Advancement of Science), 03/2013, Volume: 339, Issue: 6123Journal Article
The on-demand emission of coherent and indistinguishable electrons by independent synchronized sources is a challenging task of quantum electronics, in particular regarding its application for quantum information processing. Using two independent on-demand electron sources, we triggered the emission of two single-electron wave packets at different inputs of an electronic beam splitter. Whereas classical particles would be randomly partitioned by the splitter, we observed two-particle interference resulting from quantum exchange. Both electrons, emitted in indistinguishable wave packets with synchronized arrival time on the splitter, exited in different outputs as recorded by the low-frequency current noise. The demonstration of two-electron interference provides the possibility of manipulating coherent and indistinguishable single-electron wave packets in quantum conductors.
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