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We have measured current-voltage curves and individual charge transfer events in single-Cooper-pair pumps. We observe clear charge pumping in units of 2e, but this behavior is accompanied by significant effects from unwanted quasiparticles.
Citation
Physica E-Low-Dimensional Systems & Nanostructures
Aumentado, J.
, Keller, M.
and Martinis, J.
(2003),
A Seven Junction Cooper Pair Pump, Physica E-Low-Dimensional Systems & Nanostructures, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=30105
(Accessed October 11, 2025)