The Levinson theorem is a fundamental theorem in quantum scattering theory, which shows
the relation between the number of bound states and the phase shift at zero momentum for …

We present a theoretical study of the motion of the antihydrogen atom (H¯) in the
gravitational field of Earth above a material surface. We predict that the H¯ atom, falling in …

An ultracold atom above a horizontal mirror experiences quantum reflection from the
attractive Casimir-Polder interaction, which holds it against gravity and leads to quantum …

The low-energy behavior of the partial-wave Jost function for scattering by a long-range 1∕
rs (s> 2) central potential is investigated analytically using the linear variant of the variable …

We analyze the low-energy eN 2 collisions within the framework of the modified-effective
range theory (MERT) for the long-range potentials, developed by O'Malley et al.[J. Math …

The framework of this thesis is the GBAR collaboration at CERN, which aims to measure the
free fall acceleration of antimatter. In this thesis, we study the quantum reflection of the …

We show that the analysis of high-energy collisions provides an alternative, and sometimes
advantageous, method of gathering information on a breakup system at threshold. We …

We analyze different methods to extract from ionic measurements electron–atom scattering
parameters, such as the scattering length. Different generalizations of O'Malley et al.'s …

We employ different theoretical models, both classical and quantum-mechanical, to explore
the recoil-ion momentum distribution in positron–atom collisions. We pay special attention to …

Under certain circumstances, an elastic cross section at very low energies could differ by
orders of magnitude above or below any reasonable estimate. The first case occurs near a …