Ohmic and step noise from a single trapping center hybridized with a Fermi sea

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dc.creatorde Sousa, Rogerio
dc.creatorWhaley, K. Birgitta
dc.creatorWilhelm, Frank K.
dc.creatorvon Delft, Jan
dc.date2005-04-06
dc.date2005-10-27
dc.date.accessioned2026-07-07T06:37:39Z
dc.date.available2026-07-07T06:37:39Z
dc.descriptionWe show that single electron tunneling devices such as the Cooper-pair box or double quantum dot can be sensitive to the zero-point fluctuation of a single trapping center hybridized with a Fermi sea. If the trap energy level is close to the Fermi sea and has line-width γ> k_B T, its noise spectrum has an Ohmic Johnson-Nyquist form, whereas for γ< k_B T the noise has a Lorentzian form expected from the semiclassical limit. Trap levels above the Fermi level are shown to lead to steps in the noise spectrum that can be used to probe their energetics, allowing the identification of individual trapping centers coupled to the device.
dc.descriptionRevised version to appear in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0504149
dc.identifierhttp://arxiv.org/abs/cond-mat/0504149
dc.identifierPhys. Rev. Lett. 95, 247006 (2005)
dc.identifierdoi:10.1103/PhysRevLett.95.247006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100470
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.subjectQuantum Physics
dc.titleOhmic and step noise from a single trapping center hybridized with a Fermi sea
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