Berlin 2018 – scientific programme

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DS: Fachverband Dünne Schichten

DS 17: Poster Session I

DS 17.8: Poster

Tuesday, March 13, 2018, 18:15–20:15, Poster B

Quantum optics with electrons using surface acoustic waves — •Hugo V. Lepage, Chris J. B. Ford, and Crispin H. W. Barnes — Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom

The time evolution of a quantum particle can be described by the time dependent Schrödinger equation (TDSE). An analytical solution to this problem can only be found in a few very simple cases and numerical solutions are hard in general. We use a GPU-accelerated code to parallelize the computation of the TDSE and obtain accurate simulations of a wave function evolving through an arbitrary dynamic underlying potential. The focus of these simulations is to investigate single electron transport driven by surface acoustic waves (SAWs). SAW-driven transport is particularly interesting since it adds a new level of confinement to the electrons, suppressing their dispersion. Through non-dispersive control of single electrons, we propose a framework to implement a positive-operator-valued measure (POVM) using experimentally realistic potentials.[1] Furthermore, we simulate the coherent transport of single electrons across a tunnel-coupled wire. Our simulation results are compared to experimental observations by a collaborating group at the CNRS in Grenoble, France. In this presentation, we provide insight into the various phenomena related to single electron transport and put forward experimentally realizable designs for future optics-like protocols. [1] Arvidsson-Shukur, D.R.M., Lepage, H.V., Owen, E.T., Ferrus, T. and Barnes, C.H.W., 2017. Protocol for fermionic positive-operator-valued measures. Physical Review A, 96(5), p.052305.