William Witczak-Krempa

William Witczak-Krempa's picture
Postdoctoral Researcher
Phd: University of Toronto 2012

Area of Research:
Condensed Matter
Email: wkrempa@perimeterinstitute.ca
Phone: x6242

Research Interests

I'm a condensed matter theorist interested in quantum many-body physics at large, notably in the 'strongly-correlated' regime. My two main subjects of study are quantum criticality (including conformal field theory) and the interplay between topology and symmetry, especially symmetry protected topological order. In the latter case, this connects to quantum materials involving strong spin-orbit coupling and interactions.
I use various tools including quantum field theory, numerical variational methods, and the AdS/CFT holographic correspondence. I also collaborate extensively with numerical experts that specialize in Quantum Monte Carlo and (cluster) Dynamical Mean Field Theory.
If you are curious, take a look at my full list of publications. The most recent ones are shown below.

My PhD thesis can be found here.

Recent Publications

  • William Witczak-Krempa, Gang Chen, Yong Baek Kim, Leon Balents, "Correlated quantum phenomena in the strong spin-orbit regime", Annual Reviews of Condensed Matter Physics, 5, April 2014, arXiv: 1305.2193 (in press)
  • William Witczak-Krempa, Subir Sachdev, "Dispersing quasinormal modes in 2+1 dimensional conformal field theories", Phys. Rev. B, 87, 29 April 2013, 155149, arXiv: 1302.0847
  • William Witczak-Krempa, Ara Go, Yong Baek Kim, "Pyrochlore electrons under pressure, heat and field: shedding light on the iridates", Phys. Rev. B, 1 April 2013, 87, 155101, arXiv: 1208.4099
  • William Witczak-Krempa, Subir Sachdev, "The quasinormal modes of quantum criticality", Phys. Rev. B, 86, 12 December 2012, 235115, arXiv: 1210.4166
  • William Witczak-Krempa, "Quantum critical charge response from higher derivatives: is more different?", arXiv: 1312.3334
  • William Witczak-Krempa, Erik Sorensen, Subir Sachdev, "The dynamics of quantum criticality: Quantum Monte Carlo and holography", arXiv: 1309.2941

Seminars

  • "The dynamics of quantum criticality: Quantum Monte Carlo and holography", Aspen winter conference 'Beyond quasiparticles', Aspen, US
  • "The dynamics of quantum criticality: Quantum Monte Carlo and holography", University of Chicago, Chicago, IL, US
  • "The dynamics of quantum criticality: Quantum Monte Carlo and holography", Harvard University, Cambridge, MA, US
  • "Correlated quantum phenomena in the strong spin-orbit regime", McGill University, Montreal, QC, Canada
  • "Correlated quantum phenomena in the strong spin-orbit regime", Harvard University, Cambridge, MA, US
  • "Holographic insights into quantum critical transport: from branes to Bose-Hubbard", Workshop and Conference on Geometrical Aspects of Quantum States in Condensed Matter, ICTP, Trieste, Italy
  • "Holographic insights into quantum criticality: from black holes to Bose-Hubbard", King's College London, London, UK
  • "Interaction effects on 3D topological insulators and semi-metals", APS March Meeting 2013, Baltimore, US [Invited symposium talk]
  • "The quasi-normal modes of quantum criticality", APS March Meeting 2013, Baltimore, US
  • "The conductivity of CFTs from a holographic viewpoint", University of Illinois Urbana-Champaign, Urbana-Champaign, US
  • PIRSA:13050037, Holographic insights into quantum critical transport: from branes to Bose-Hubbard, 2013-05-08, Emergence & Entanglement II 2013
  • "Holography and quantum criticality", Condensed matter group meeting, Perimeter Institute, Waterloo, Canada
  • "Quasinormal modes of quantum criticality", Holography group meeting, Perimeter Institute, Waterloo, Canada
  • PIRSA:11120075, Interactions and Spin Orbit: from Weyls to Helical Spin Liquids, 2011-12-08, Condensed Matter