Quantum realism to semiconductor nanoscience
Add to Google Calendar
Nanoscience will advance to true device engineering only when both new quantum processes and realistic quantum-theory insights are added to the design repertoire. Since quantum processes are driven by many-body interactions, nearly all design models are still insufficient as they crudely approximate many-body effects. In this seminar, I will show how to apply a first-principles many-body theory to realistically describe interactions among particle clusters driving diverse quantum processes. Using this framework, I will introduce quantum-optical spectroscopy which utilizes quantum fluctuations of light to select a desired quantum process among multiple excitation paths. I will illustrate this idea through the experimental discovery of a dropleton. Applying the cluster identification for excitations with few-cycle terahertz pulses, I will explain how ultrafast experiments can access delicate quantum processes in semiconductors, such as high-harmonic generation, dynamical Bloch oscillations, electronic quantum interferences, nonlinear Coulomb effects among Landau electrons, and pure correlation transport across a semiconductor interface. I will also demonstrate how the approach quantitatively explains the first Bose"“Einstein condensate experiment with the strongest possible atom"“atom interactions. In short, my approach provides both a systematic and realistic description for a broad range of systems explored in material- and nanoscience.