Tunneling of Cooper pairs across voltage biased asymmetric single-Cooper-pair transistors

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dc.creatorLeppäkangas, J.
dc.creatorThuneberg, E.
dc.creatorLindell, R.
dc.creatorHakonen, P.
dc.date2006-04-04
dc.date.accessioned2026-07-07T07:41:51Z
dc.date.available2026-07-07T07:41:51Z
dc.descriptionWe analyze tunneling of Cooper pairs across voltage biased asymmetric single-Cooper-pair transistors. Also tunneling of Cooper pairs across two capacitively coupled Cooper-pair boxes is considered, when the capacitive coupling and Cooper pair tunneling are provided by a small Josephson junction between the islands. The theoretical analysis is done at subgap voltages, where the current-voltage characteristics depend strongly on the macroscopic eigenstates of the island(s) and their coupling to the dissipative environment. As the environment we use an impedance which satisfies Re[Z]<<R_Q and a few LC-oscillators in series with Z. The numerically calculated I-V curves are compared with experiments where the quantum states of mesoscopic SQUIDs are probed with inelastic Cooper pair tunneling. The main features of the observed I-V data are reproduced. Especially, we find traces of band structure in the higher excited states of the Cooper-pair boxes as well as traces of multiphoton processes between two Cooper-pair boxes in the regime of large Josephson coupling.
dc.description9 pages, 9 figures, Revtex4
dc.identifierhttps://arxiv.org/abs/cond-mat/0604092
dc.identifierhttp://arxiv.org/abs/cond-mat/0604092
dc.identifierPhys. Rev. B 74 054504 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.054504
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122270
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.titleTunneling of Cooper pairs across voltage biased asymmetric single-Cooper-pair transistors
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