Geometric phase related to point-interaction transport on a magnetic   Lobachevsky plane
  We consider a charged quantum particle living in the Lobachevsky plane and interacting with a homogeneous magnetic field perpendicular to the plane and a point interaction which is transported adiabatically along a closed loop C in the plane. We show that the bound-state eigenfunction acquires at that the Berry phase equal to 2\pi times the number of the flux quanta through the area encircled by C. 
S.A. Albeverio, P. Exner, V.A. Geyler