Coherent Cooper-pair pumping by magnetic flux control
arXiv:1209.3626 · doi:10.1103/PhysRevB.86.224510
Abstract
We introduce and discuss a scheme for Cooper-pair pumping. The scheme relies on the coherent transfer of a superposition of charge states across a superconducting island and is realized by adiabatic manipulation of magnetic fluxes. Differently from previous implementations, it does not require any modulation of electrostatic potentials. We find a peculiar dependence of the pumped charge on the superconducting phase bias across the pump and that an arbitrarily large amount of charge can be pumped in a single cycle when the phase bias is π. We explain these features and their relation to the adiabatic theorem.
9 pages, 6 figures
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- Interplay of charge and vorticity quantization in superconducting Coulomb blockaded island
- Full counting statistics applied to dissipative Cooper pair pumping
- Flux pumping of Cooper pairs through a Josephson Energy-Suppression Pump