Coherent superconducting quantum pump

Abstract

We demonstrate non-adiabatic charge pumping utilizing a sequence of coherent oscillations between a superconducting island and two reservoirs. Our method, based on pulsed quantum state manipulations, allows to speedup charge pumping to a rate which is limited by the coupling between the island and the reservoirs given by the Josephson energy. Our experimental and theoretical studies also demonstrate that relaxation can be employed to reset the pump and avoid accumulation of errors due to non-ideal control pulses.

4 pages, 3 figures

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Cited by in corpus (5)

• Milestones toward Majorana-based quantum computing
• Single-electron current sources: towards a refined definition of ampere
• Interaction effect on adiabatic pump of charge and spin in quantum dot
• Single Cooper-pair pumping in the adiabatic limit and beyond
• Coherent Cooper-pair pumping by magnetic flux control