Resonant Cooper Pair Tunneling: Quantum Noise and Measurement Characteristics

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dc.creatorClerk, A. A.
dc.creatorGirvin, S. M.
dc.creatorNguyen, A. K.
dc.creatorStone, A. D.
dc.date2002-03-16
dc.date2002-03-27
dc.date.accessioned2026-07-07T02:44:43Z
dc.date.available2026-07-07T02:44:43Z
dc.descriptionWe study the quantum charge noise and measurement properties of the double Cooper pair resonance point in a superconducting single-electron transistor (SSET) coupled to a Josephson charge qubit. Using a density matrix approach for the coupled system, we obtain a full description of the measurement back-action; for weak coupling, this is used to extract the quantum charge noise. Unlike the case of a non-superconducting SET, the back-action here can induce population inversion in the qubit. We find that the Cooper pair resonance process allows for a much better measurement than a similar non-superconducting SET, and can approach the quantum limit of efficiency.
dc.description5 pages, 3 figures; factor of two error in last paragraph corrected
dc.identifierhttps://arxiv.org/abs/cond-mat/0203338
dc.identifierhttp://arxiv.org/abs/cond-mat/0203338
dc.identifierPhys. Rev. Lett. 89, 176804 (2002).
dc.identifierdoi:10.1103/PhysRevLett.89.176804
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19039
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleResonant Cooper Pair Tunneling: Quantum Noise and Measurement Characteristics
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