Probing Collective Excitations in Quantum Matter by Transport and Spectroscopy

Organizers:
N. Peter Armitage, Johns Hopkins University
Cristian Batista, University of Tennessee
Johannes Knolle, Technical University of Munich
*Natalia Perkins, University of Minnesota

In recent years, significant progress has been made in understanding strongly correlated quantum materials, with a particular focus on topological systems like quantum spin liquids. These achievements in understanding have been made possible by remarkable developments in both materials science and experimental techniques. In particular, improvements in both traditional experimental tools (e.g., inelastic neutron scattering, Raman scattering, resonant X-ray scattering, and ultrasound spectroscopy) and the introduction of innovative techniques such as 2D coherent THz spectroscopy and sophisticated noise experiments have advanced studies of quantum matter to qualitatively new levels of insight. While our theoretical understanding of ground state properties, including their classification, has likewise seen significant improvements, there remains a relative gap in our comprehension of experimentally accessible dynamical response functions. This workshop aims to bridge this gap by fostering theoretical advancements in understanding the dynamics of collective excitations. We will explore novel approaches for computing dynamical response functions in highly entangled systems, providing insights into various spectroscopic techniques, including nonlinear responses. We invite applications from scientists interested in this  research and hope that through collaboration we will advance our understanding of complex quantum phenomena and their manifestations in experimental settings.