Interference of independently emitted electrons in quantum shot noise
M. Büttiker, P. Samuelsson
Oct 1, 2007
Citations
4
Citations
Journal
Annalen der Physik
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Semantic Scholar
Key Takeaway Key Takeaway: Two-particle interference effects can be generated dynamically in multiparticle observables like shot noise correlations, highlighting their general nature and relevance beyond specific geometry.
Abstract
Theory predicts that electrons emitted from independent electron sources (metallic contacts) can nevertheless interfere. This interference is manifest in an exchange contribution to the shot noise correlation of currents at different contacts of a mesoscopic conductor. A geometry has been proposed in which second order (single particle) interference due to superposition of amplitudes is absent but fourth order (two‐particle) interference exhibits Aharonov‐Bohm oscillations. Recently such a geometry has been realized in an experiment and the theoretically predicted two‐particle Aharonov‐Bohm effect has been detected. We discuss Bell measurements and quantum state tomography using shot noise correlations. We discuss in addition structures in which two‐particle interference effects are generated dynamically by varying electrostatic potentials with the help of gates or by generating electron‐hole pairs by irradiating contacts of a mesoscopic conductor. These examples emphasize that two‐particle processes are not related to a particular geometry but are a general feature of multiparticle observables like shot noise correlations.