Mr Johannes Bausch


  • April-June 2016: Visiting Student Researcher, California Institute of Technology
  • 2015-date: Honorary Research Assistant, University College London
  • 2014-date: PhD in Quantum Information, DAMTP, St John's College, University of Cambridge
  • 2012-2013: MASt in Pure Mathematics and Theoretical Physics, DPMMS, St John's College, University of Cambridge
  • 2011-2012: Cornell-Heidelberg fellow, Physics, Cornell University
  • 2008-2011: BSc in Physics, University of Heidelberg

Research Interest

I am researching the interplay between quantum mechanics and information theory, such as Hamiltonian complexity and quantum channel divisibility. I am particularly interested in the local Hamiltonian problem and related fields of research, and how systems described by local interactions are able to perform universal computation. My general interest ranges from quantum and high energy physics to pure mathematics, analysis and probability, as well as computer science, especially algorithms and simulations.

I also like neural networks and won the 2nd price in Microsoft's Quantum Challenge.


Publications and Preprints


  • Heilbronn and QALGO Quantum Algorithms Meeting 2016 in Cambridge, UK: The Complexity of Translationally Invariant Spin Chains with Low Dimension. Joint work with Toby Cubitt and Maris Ozols.
  • QIP 2016 in Banff, Canada: The Complexity of Translationally Invariant Spin Chains with Low Local Dimension.
  • AQIS 2015 in Seoul, South Korea: The Complexity of Divisibility. Joint work with Toby Cubitt.
  • QIPC 2015 in Leeds, UK: The Complexity of Divisibility.
  • Invited Talks at group meetings and seminars at UCL (2015), Universidad Complutense de Madrid (2015), University of Bristol (2016) and Caltech (2016).


  • QIP 2015 in Sydney, Australia: The Complexity of Divisibility.
  • Microsoft Faculty Summit 2016 in Seattle, USA: Quantum Neural Networks: a Hamiltonian Complexity Approach
  • YQIS 2016 in Barcelona, Spain: The Complexity of Low-Dimensional Spin Lattices in 3D