  In this paper, we propose a novel kind of Josephson-Energy Suppression Pump
(JESP) controlled by a fully magnetic flux drive. The device presented here is
composed of two superconducting loops interrupted at one side by
superconducting nanowires which are joined together by a superconducting
island. The phase difference developed at the edges of the nanowires by means
of the magnetic flux threading the loops can collapse their Cooper condensates,
leading to complete suppression of the Josephson energies. This mechanism
allows to greatly reduce the leakage current when performing Cooper pair
pumping by a pure magnetic pumping cycle without involving any gate modulation.
The pumping capability of the JESP is studied through a master equation
approach in the non-adiabatic case.
