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Where is the shot noise of a quantum point contact?

Green, Frederick; Thakur, Jagdish S; Das, Mukunda P


Reznikov et al. [Phys. Rev. Lett. 75, 3340 (1995)] have presented definitive observations of nonequilibrium noise in a quantum point contact. Especially puzzling is the “anomalous” peak structure of the excess noise measured at constant current; to date it remains unexplained. We show that their experiment directly reveals the deep link between conservation principles in the electron gas and its low-dimensional, mesoscopic behavior. The keys to that connection are gauge invariance and the...[Show more]

CollectionsANU Research Publications
Date published: 2004-04-16
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.92.156804


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