Research activities

Quantum mechanics predicts that electrons in a solid or atoms in a gas can loose their single-particle properties completely and instead start behaving collectively. This often leads to the emergence of new states of matter which are a fascinating topic for fundamental research and offer the potential for technological advances. Important examples include high-temperature superconductivity in cuprates and iron pnictides, quantum wires such as carbon nanotubes, as well as the Bose-Einstein condensation in trapped atomic gases at ultracold temperatures.

The research interests of our group lie in the theoretical explanation of the physics of such strongly correlated quantum systems. Recent publications include work on

  • Quenches and thermalization,

  • Many-body localization,

  • Entanglement measures,

  • Dynamical quantum phase transitions,

  • transport in spin chains and quantum wires,

  • spin textures in quantum dots,

  • neural networks for many-body systems,

  • multiferroic behavior in spin chains,

  • domain walls in ferromagnetic Luttinger liquids,

  • compounds with orbital degrees of freedom,

  • quantum critical points in magnetic systems with frustration,

  • field- or pressure-driven phase transitions in magnetic systems (Bose-Einstein condensation of magnons).

Our research on these topics often combines analytical methods (Bethe ansatz, bosonization, conformal field theory, nonlinear sigma-models, renormalization group) with numerical methods, in particular, the density-matrix renormalization group (DMRG). We have developed several new DMRG-type algorithms to study quantum dynamics both in equilibrium at finite temperatures and in non-equilibrium following a quantum quench.

Upcoming conferences (Organization or Participation)

  1. Physics at the Nanoscale, Symposium in Honor of Tapash Chakraborty, April 23 - 24, 2018, University of Manitoba, Winnipeg (information and registration)
  2. Affleck@65 Symposium, Symposium to celebrate Ian Affleck's 65th birthday, April 26 - 28, 2018, UBC, Vancouver (information and registration)
  3. Transport in Strongly Correlated Quantum Systems, July 16 - August 3, 2018, International Conference, IIP Natal, Brazil (information and registration)
  4. Les Houches Summer School: Integrability in Atomic and Condensed Matter Physics, August 2018, Les Houches, France (Information and registration)
  5. Third workshop FOR 2316: Correlations in integrable quantum many-body systems, September 3 -7, 2018, University of Wuppertal, Germany (information and registration)
  6. 13th International School on Theoretical Physics: Symmetry and Structural Properties of Condensed Matter, September 10 - 15, 2018, Rzeszów University, Poland (information and registration)
research.txt · Last modified: 2020/08/13 19:56 by js
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