Selected Publications

Single Quantum Level Electron Turnstile

D.M.T. Van Zanten, D.M. Basko, I.M. Khaymovich, J.P. Pekola, H. Courtois, C.B. Winkelmann

We report on the realization of a single-electron source, where current is transported through a single-level quantum dot (Q) tunnel coupled to two superconducting leads (S). When driven with an ac gate voltage, the experiment demonstrates electron turnstile operation. Compared to the more conventional superconductor-normal-metal-superconductor turnstile, our superconductor-quantum-dot-superconductor device presents a number of novel properties, including higher immunity to the unavoidable presence of nonequilibrium quasiparticles in superconducting leads. Moreover, we demonstrate its ability to deliver electrons with a very narrow energy distribution.

Phys. Rev. Lett. 116 166801 (2016)

doi: 10.1103/PhysRevLett.116.166801