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Ballistic Transport is Dissipative: The Why and How

Das, Mukunda P; Green, F

Description

In the ballistic limit, the Landauer conductance steps of a mesoscopic quantum wire have been explained by coherent and dissipationless transmission of individual electrons across a one-dimensional barrier. This leaves untouched the central issue of conduction: a quantum wire, albeit ballistic, has finite resistance and so must dissipate energy. Exactly how does the quantum wire shed its excess electrical energy? We show that the answer is provided, uniquely, by many-body quantum kinetics. Not...[Show more]

dc.contributor.authorDas, Mukunda P
dc.contributor.authorGreen, F
dc.date.accessioned2015-12-13T22:51:57Z
dc.identifier.issn0953-8984
dc.identifier.urihttp://hdl.handle.net/1885/81326
dc.description.abstractIn the ballistic limit, the Landauer conductance steps of a mesoscopic quantum wire have been explained by coherent and dissipationless transmission of individual electrons across a one-dimensional barrier. This leaves untouched the central issue of conduction: a quantum wire, albeit ballistic, has finite resistance and so must dissipate energy. Exactly how does the quantum wire shed its excess electrical energy? We show that the answer is provided, uniquely, by many-body quantum kinetics. Not only does this inevitably lead to universal quantization of the conductance, in spite of dissipation; it fully resolves a baffling experimental result in quantum-point-contact noise. The underlying physics rests crucially upon the action of the conservation laws in these open metallic systems.
dc.publisherInstitute of Physics Publishing
dc.sourceJournal of Physics: Condensed Matter
dc.subjectKeywords: Electric conductance; Electrons; Energy dissipation; Quantum theory; Semiconductor quantum wires; Transport properties; Ballistic transport; Finite resistance; Landauer conductance; Open metallic systems; Ballistics
dc.titleBallistic Transport is Dissipative: The Why and How
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume17
dc.date.issued2005
local.identifier.absfor020405 - Soft Condensed Matter
local.identifier.ariespublicationMigratedxPub9642
local.type.statusPublished Version
local.contributor.affiliationDas, Mukunda P, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGreen, F, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpageV13
local.bibliographicCitation.lastpageV16
local.identifier.doi10.1088/0953-8984/17/46/N01
dc.date.updated2015-12-11T10:48:05Z
local.identifier.scopusID2-s2.0-27744476738
CollectionsANU Research Publications

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