About: Noise calculations within the second-order von Neumann approach

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://link.aps.org/doi/10.1103/PhysRevB.84.233303
Description	We extend the second-order von Neumann approach within the generalized master equation formalism for quantum electronic transport to include the counting field. The resulting non-Markovian evolution equation for the reduced density matrix of the system resolved with respect to the number of transported charges enables the evaluation of the noise and higher-order cumulants of the full counting statistics. We apply this formalism to an analytically solvable model of a single-level quantum dot coupled to highly biased leads with Lorentzian energy-dependent tunnel coupling and demonstrate that, although reproducing exactly the mean current, the resonant tunneling approximation is not exact for the noise and higher-order cumulants. Even if it may fail in the regime of strongly non-Markovian dynamics, this approach generically improves results of lower-order and/or Markovian approaches. We extend the second-order von Neumann approach within the generalized master equation formalism for quantum electronic transport to include the counting field. The resulting non-Markovian evolution equation for the reduced density matrix of the system resolved with respect to the number of transported charges enables the evaluation of the noise and higher-order cumulants of the full counting statistics. We apply this formalism to an analytically solvable model of a single-level quantum dot coupled to highly biased leads with Lorentzian energy-dependent tunnel coupling and demonstrate that, although reproducing exactly the mean current, the resonant tunneling approximation is not exact for the noise and higher-order cumulants. Even if it may fail in the regime of strongly non-Markovian dynamics, this approach generically improves results of lower-order and/or Markovian approaches. (en)
Title	Noise calculations within the second-order von Neumann approach Noise calculations within the second-order von Neumann approach (en)
skos:prefLabel	Noise calculations within the second-order von Neumann approach Noise calculations within the second-order von Neumann approach (en)
skos:notation	RIV/00216208:11320/11:10106059!RIV12-GA0-11320___
http://linked.open...avai/predkladatel	Matematicko-fyzikální fakulta
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GCP204/11/J042), Z(MSM0021620834)
http://linked.open...iv/cisloPeriodika	23
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Novotný, Tomáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	216132
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/11:10106059
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	approach; Neumann; von; second-order; within; calculations; Noise (en)
http://linked.open.../riv/klicoveSlovo	Noise approach within calculations Neumann second-order von
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[FA8BE80A5160]
http://linked.open...i/riv/nazevZdroje	Physical Review B - Condensed Matter and Materials Physics
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Supercurrent and ac-Josephson effect in unconventional nanoscopic junctions
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	84
http://linked.open...iv/tvurceVysledku	Novotný, Tomáš Brandes, Tobias Emary, Clive Zedler, Philipp
http://linked.open...ain/vavai/riv/wos	000297933500001
http://linked.open...n/vavai/riv/zamer	Condensed Matter Physics – New Materials and Technologies
issn	1098-0121
number of pages	4 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevB.84.233303
http://localhost/t...ganizacniJednotka	11320
is http://linked.open...avai/riv/vysledek of	Noise calculations within the second-order von Neumann approach Noise calculations within the second-order von Neumann approach

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