Quantum Spin Dynamics


Nathan Johnson


Postdoctoral Researcher

email: nathan.johnson@ucl.ac.uk 



Research Interests

I investigate the world of quantum mechanics and how we can use quantum properties in new technologies. I am interested in the intersection of the quantum world - which ultimately governs everything at the smallest scales - with the classical world we experience. My research focusses on the experimental and theoretical study and applications of quantum transport in semiconductors, but I am also pursuing novel materials including molecular and hybrid semiconductors. Specifically, I am working towards development of single electron state preparation and manipulation in semiconductors and related materials for use in quantum computation, quantum sensing and quantum metrology.

Interesting fact

I have lived on 3 continents.

Selected Publications

     LO-phonon emission rate of hot electrons from an on-demand single-electron source in a GaAs/AlGaAs heterostructure; N. JohnsonC. EmaryS. RyuH.-S. SimP. SeeJ. D. FletcherJ. P. GriffithsG. A. C. JonesI. FarrerD. A. RitchieM. PepperT. J. B. M. JanssenM. KataokaPhys. Rev. Lett. 121 137703 2018arXiv:1712.09031 

     Measurement of the curvature and height of the potential barrier for a dynamic quantum dot; N. Johnson, G. Yamahata, A. Fujiwara; Appl. Phys. Lett. 115 162103 2019; arXiv 1907.08445

Picosecond coherent electron motion in a silicon single-electron source; G. Yamahata, S. Ryu, N. Johnson, H.-S. Sim, A. Fujiwara, M. Kataoka; Nat. Nanotech. 14 1019 2019arXiv 1903.07802

Continuous-variable tomography of solitary electrons
J. D. FletcherN. JohnsonE. LocaneP. SeeJ. P. GriffithsI. FarrerD. A. RitchieP. W. BrouwerV. KashcheyevsM. Kataoka; Nat. Commun. 10 5298 2019; arXiv 1901.10985

    UCL RPS: https://iris.ucl.ac.uk/iris/browse/profile?upi=NLJOH33]