Defence of dissertation in the field of engineering physics, Elina Potanina, M.Sc.

Delivering electrons one by one

Title of the dissertation is “Optimization of Quantum Pumps”

Electron pumping is a process of capturing and releasing electrons periodically. Fast and accurate on-demand single-electron delivery is crucial for nanoelectronics and quantum current standard realization. On May 20, 2019, the definition of ampere was officially changed. The new quantum ampere is defined using the elementary charge and the caesium frequency standard. Recent developments in quantum technology and nano-device fabrication have already enabled single-electron pumping with close-to-metrological accuracy. One more order of magnitude improvement in accuracy is needed.

Optimization of a quantum pump implies a recipe with a control protocol that allows for extremely accurate and fast capture and release of a quantum particle. In this dissertation, I propose the optimal operating conditions for an experimentally available tunable-barrier single-electron pump.

Opponent: Associate Professor Peter Samuelsson, Lund University, Sweden

Custos: Professor Christian Flindt, Aalto University School of Science, Department of Applied Physics

Contact information: Elina Potanina, Bluefors Oy, [email protected], 0449454097

Electronic dissertation

The dissertation is publicly displayed 10 days before the defence at the noticeboard of the School of Science in Konemiehentie 2, Espoo.

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