"Many-body quantum spectroscopies in extremes" by Prof. Kira, Univ of Michigan

"Many-body quantum spectroscopies in extremes"

Quantum many-body problems remain largely unsolved because their information content grows exponentially with particle number due to interactions. I will overview why identifying particle clusters yields a realistic first-principles description of diverse many-body and quantum-optics problems. These ideas generalize laser spectroscopy into quantum-optical spectroscopy, directly accessing complicated many-body states via quantum-optical correlations among photons. The resulting control of clusters introduces clustronics as a powerful approach to realize macroscopic quantum effects. Extremely strong driving fields yield then lightwave clustronics where quasiparticles are transported on time scales much faster than typical phonon and Coulomb scattering times. I will discuss how the clustronics theory realistically guides experiments by showing several examples involving semiconductors and atomic Bose–Einstein condensates.