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Cooper pair tunneling in circuits with substantial dissipation: the three-junction R-pump for single Cooper pairs

A. B. Zorin·S. A. Bogoslovsky·S. V. Lotkhov·J. Niemeyer
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Abstract

We propose a circuit comprising a linear array of three small-capacitance superconducting tunnel junctions with miniature resistors (R > R_Q = h/4e^2 = 6.5 kOhm) attached to the ends of this array. Owing to the Coulomb blockade effect and the effect of dissipative environment on the supercurrent, this circuit enables the gate-controlled transfer of individual Cooper pairs. The first experiment on operating the Al-Cr Cooper pair R-pump is described.

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A. B. Zorin, S. A. Bogoslovsky, S. V. Lotkhov, J. Niemeyer. 2000-12-11. Cooper pair tunneling in circuits with substantial dissipation: the three-junction R-pump for single Cooper pairs. https://arxiv.org/abs/cond-mat/0012177

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