Dissipation in a quantum wire: fact and fantasy - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Dissipation in a quantum wire: fact and fantasy - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: Where, and how, does energy dissipation of electrical energy take place in aballistic wire? Fully two decades after the advent of the transmissivephenomenology of electrical conductance, this deceptively simple query remainsunanswered. We revisit the quantum kinetic basis of dissipation and show itspower to give a definitive answer to our query. Dissipation leaves a clear,quantitative trace in the non-equilibrium current noise of a quantum pointcontact; this signature has already been observed in the laboratory. We thenhighlight the current state of accepted understandings in the light ofwell-known yet seemingly contradictory measurements. The physics of mesoscopictransport rests not in coherent carrier transmission through a perfect anddissipationless metallic channel, but explicitly in their dissipative inelasticscattering at the wire-s interfaces and adjacent macroscopic leads.



Author: Mukunda P. Das, Frederick Green

Source: https://arxiv.org/



DOWNLOAD PDF




Related documents