Šoda, Barbara2023-01-122023-01-122023-01-122022-12-12http://hdl.handle.net/10012/19053We present new results on different aspects of quantum interactions, from new phenomena to new mathematical tools. First, two new phenomena of light-matter interactions are presented: the stimulated Unruh effect and acceleration induced transparency. We show how the two combined lead to improved measurability of the Unruh effect in the laboratory. Building on that, we present a method to modulate the strength of general quantum interactions, which we call the parametrically induced decoupling. Then, as an answer to the mathematical challenges of describing quantum interactions, we present Newton’s cradle spectra as a new tool for understanding nonperturbative physics. This is followed by a work describing what influences the rate at which a quantum channel arises at the onset of an interaction between two systems. Finally, we describe a new method to generate superoscillations of arbitrary shape, and the new idea of quantum prison break, whereby a quantum object contained in a finite space may escape it and jump to a predefined region, when triggered by a suitable measurement.enDoctoral Thesis