2003/05/31 by Jaan Männik, J. Mannik, J. E. Lukens · 1 citation
Engineering · Physics and Astronomy · #Biasing #Charge (physics) #Condensed matter physics #Cooper pair #Coulomb #Coulomb blockade #Electrometer #Molecular Junctions and Nanostructures #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #Quasiparticle #Superconductivity #Transistor #Voltage #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.92.057004
published as Phys. Rev. Lett. 92, 057004 (2004) · 4 pages, 4 figures, revised version
arxiv created 2003/11/06 · openalex publication_date 2004/02/05 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on the effect of the backaction of a single Cooper pair transistor electrometer (E) on the charge state of a superconducting box (B). The charge is e periodic in the gate bias of B when E is operated near voltages 2\ensuremathΔ/e or 4\ensuremathΔ/e. We show that this is due to quasiparticle poisoning of B at a rate proportional to the number of quasiparticle tunneling events in E per second. We are able to eliminate this backaction and recover 2e-charge periodicity using a new measurement method based on switching-current modulation of E.