Comment on "The hard sphere quantum propagator: exact results via partial wave analysis''

Arseni Goussev, Orestis Georgiou, Valeriy Slastikov

There is no known exact expression for the propagator of a non-relativistic particle colliding with a hard sphere. De Prunelé (2008 {\it J.~Phys.~A:~Math.~Theor.} {\bf 41} 255305)…