QUANTUM MATERIALS AND DEVICES SEMINARS: Quantum metric in Hermitian and pseudo-Hermitian systems
In the first part of my talk, I will introduce and explain the main features of the quantum metric, which is a gauge-invariant geometric tensor that arises from the band structure of lattice models. I will show that it plays an important role in superconducting and topological systems in two dimensions and in the semiclassical dynamics of wave-packets. Importantly, this quantity has been recently measured in several synthetic-matter experiments. In the second part of the talk, I will present my original contributions to the field, by discussing the role of the quantum metric in three-dimensional Hermitian topological semimetals and in gapped pseudo-Hermitian phases.
The latter are non-Hermitian models that are characterised by real energy spectra and can describe suitable quantum dissipative systems.
host: Miguel A. Cazalilla
Online Seminar, Donostia International Physics Center
Giandomenico Palumbo, Dublin Institute for Advanced Studies (DIAS), Republic of Ireland