Simulating ground states and elementary excitations with PEPS (Dr. Laurens Vanderstraeten)

Simulating ground states and elementary excitations with PEPS

  • Date: Dec 13, 2019
  • Time: 11:30
  • Speaker: Dr. Laurens Vanderstraeten
  • (Ghent University)
  • Location: Max-Planck-Institut für Quantenoptik
  • Room: B2.46
In this talk we review variational PEPS algorithms for two-dimensional quantum spin systems. First we focus on the optimization of ground-state approximations for generic hamiltonians, and show some benchmark results. Next, we build excited-state wavefunctions on top of such a PEPS ground state using a generalization of the single-mode approximation.

We show how to compute dispersion relations with this approach, and compare with other methods. We close with applications of the same PEPS methods for simulating three-dimensional stat. mech. models.

Link to Dr. Laurens Vanderstraeten:

https://www.mpq.mpg.de/6103393/12-09-laurens-vanderstraeten?c=4709020


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