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
References in corpus (11)
- Coherent electronic transfer in quantum dot systems using adiabatic passage
- Experimental determination of the Berry phase in a superconducting charge pump
- Measurement scheme of the Berry phase in superconducting circuits
- Nanoampere pumping of Cooper pairs
- Connecting Berry's phase and the pumped charge in a Cooper pair pump
- Decoherence of adiabatically steered quantum systems
- Non-abelian superconducting pumps
- The Cooper Pair Pump as a Quantized Current Source
- Single Cooper-pair pumping in the adiabatic limit and beyond
- Stabilized parametric Cooper-pair pumping in a linear array of coupled Josephson junctions
- Quantum effect of inductance on geometric Cooper-pair transport