G. Dufour

Quantum reflection of antihydrogen from the Casimir potential above matter slabs

We study quantum reflection of antihydrogen atoms from matter slabs due to the van der Waals/Casimir-Polder (vdW/CP) potential. By taking into account the specificities of antihydrogen and the optical properties and width of the slabs we calculate realistic estimates for the potential and quantum reflection amplitudes. Next we discuss the paradoxical result of larger reflection coefficients estimated for weaker potentials in terms of the Schwarzian derivative. We analyze the limiting case of reflections at small energies, which are characterized by a scattering length and have interesting applications for trapping and guiding antihydrogen using material walls.

Shaping the distribution of vertical velocities of antihydrogen in GBAR

GBAR is a project aiming at measuring the free-fall acceleration of gravity for antimatter, namely antihydrogen atoms (

Quantum reflection and Liouville transformations from wells to walls

\overline{\mathrm {H}}

Quantum ballistic experiment on antihydrogen fall

H¯). The precision of this timing experiment depends crucially on the dispersion of initial vertical velocities of the atoms as well as on the reliable control of their distribution. We propose to use a new method for shaping the distribution of the vertical velocities of

Towards a test of the weak equivalence principle of gravity using anti-hydrogen at CERN

\overline{\mathrm {H}}

Totally Destructive Many-Particle Interference

H¯, which improves these factors simultaneously. The method is based on quantum reflection of elastically and specularly bouncing