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Department of Applied Mathematics and Theoretical Physics


  • 2018-Present: PhD (Applied Mathematics and Theoretical Physics), University of Cambridge
  • 2017-2018: MPhil (Physics), University of Cambridge
  • 2016: BSc (Hons) (Physics), Australian National University
  • 2013-2015: BSc (Mathematics and Physics), University of Queensland


Alexander is a member of the Department of Applied Mathematics and Theoretical Physics, working in Professor Natalia Berloff's Quantum Fluids Group. His current research aims to shed light on the nature of the possibile equilibrium states that emerge from networks of interacting polariton condensates.

Selected Publications

  • A. Johnston, K. P. Kalinin, and N. G. Berloff, "Artificial polariton molecules", Physical Review B (Letter)103, L060507 (2021).
  • A. Johnston, M. Hole, Z. Qu, and H. Hezaveh, "The effect of pressure anisotropy on ballooning modes in tokamak plasmas", Plasma Physics and Controlled Fusion, 60 065006 (2018).

Research Group

Quantum Fluids




01223 766891