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: