From atoms to nuclei, quarks and bejond...

Latest Results for Few-Body Systems

14 September 2024

• Stereodynamics Effects on van der Waals Molecule Formation Through Three-Body Recombination

  Abstract

  In this work, we present a study on the role of atomic configurations in forming van der Waals molecules through three-body recombination. Fixing the angle between the two momenta associated with the Jacobi vectors, we calculate the reaction probability for a specific configuration. In this way, we elucidate the nature of the total reaction probability in reactions X + He + He \(\rightarrow \) XHe + He, essential for understanding van der Waals molecules formation in molecular beams and buffer gas cells.

• Formation of the Positronium Antihydride Molecules ( $$\bar{\textrm{H}}\textrm{Ps}$$ ) in Low Energy, 5-Body Collisions of Antihydrogen Ion $$\bar{\textrm{H}}^+$$ with Positronium Atoms Ps

  Abstract

  In this paper we present the first pilot calculation of the elastic and inelastic cross sections for the 5-body scattering of antihydrogen ions with positronium atoms. These cross sections have not been calculated before and are not known experimentally. In particular, we focus on the collisional rearrangement reactions \(\bar{{ \mathrm H}}^+ + \textrm{Ps} \rightarrow {\bar{\textrm{H}}}\textrm{Ps} +{\mathrm{e^+}}\) which deplete the \(\bar{\textrm{H}}^+\) ions and result in stable atomcules \(\bar{\textrm{H}}\textrm{Ps}\) . To better understand the mechanism of this rearrangement, we study the 3-dimensional, angle resolved positron densities of the 3- and 4-body fragments in the initial and final states of the rearrangement collision.

• Exploring Pulsar Glitches with Dipolar Supersolids

  Abstract

  Glitches are sudden spin-up events that interrupt the gradual spin-down of rotating neutron stars. They are believed to arise from the rapid unpinning of vortices in the neutron star inner crust. The analogy between the inner crust of neutron stars and dipolar supersolids allows to investigate glitches. Employing such analogy, we numerically analyze the vortex trapping mechanism and how the matter density distribution influences glitches. These results pave the way for the quantum simulation of celestial bodies in laboratories.