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Article: Theory of excess noise of a quantum dot in the presence of a microwave field

TitleTheory of excess noise of a quantum dot in the presence of a microwave field
Authors
KeywordsPhysics
Issue Date2000
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter and Materials Physics), 2000, v. 61 n. 19, p. 13032-13036 How to Cite?
AbstractThe power spectrum of excess noise of a quantum dot coupled to two leads and irradiated by a microwave field of frequency Ω is derived exactly by directly solving the Heisenberg equation. We found that for Γ<ħΩ, where Γ is the linewidth of the intradot energy level, the power spectrum can be nonzero even if the averaged current is zero. This property originates from photon-assisted tunneling and is very different from the shot noise in steady state. For Γ≫ħΩ, our results are consistent with the recent experiment by Schoelkopf et al. and previous theory.
Persistent Identifierhttp://hdl.handle.net/10722/43311
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSun, QFen_HK
dc.contributor.authorWang, Jen_HK
dc.contributor.authorLin, THen_HK
dc.date.accessioned2007-03-23T04:43:20Z-
dc.date.available2007-03-23T04:43:20Z-
dc.date.issued2000en_HK
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics), 2000, v. 61 n. 19, p. 13032-13036en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43311-
dc.description.abstractThe power spectrum of excess noise of a quantum dot coupled to two leads and irradiated by a microwave field of frequency Ω is derived exactly by directly solving the Heisenberg equation. We found that for Γ<ħΩ, where Γ is the linewidth of the intradot energy level, the power spectrum can be nonzero even if the averaged current is zero. This property originates from photon-assisted tunneling and is very different from the shot noise in steady state. For Γ≫ħΩ, our results are consistent with the recent experiment by Schoelkopf et al. and previous theory.en_HK
dc.format.extent93995 bytes-
dc.format.extent25600 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.subjectPhysicsen_HK
dc.titleTheory of excess noise of a quantum dot in the presence of a microwave fielden_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=61&issue=19&spage=13032&epage=13036&date=2000&atitle=Theory+of+excess+noise+of+a+quantum+dot+in+the+presence+of+a+microwave+fielden_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.61.13032en_HK
dc.identifier.scopuseid_2-s2.0-0001306950-
dc.identifier.hkuros55933-
dc.identifier.isiWOS:000087159100087-

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