Quantum solvable models with nonlocal one point interactions
  Within the framework of quantum mechanics working with one-dimensional, manifestly non-Hermitian Hamiltonians $H=T+V$ the traditional class of the exactly solvable models with local point interactions $V=V(x)$ is generalized. The consequences of the use of the nonlocal point interactions such that $(V f)(x) = \int K(x,s) f(s) ds$ are discussed using the suitably adapted formalism of boundary triplets. 
Sergii Kuzhel and Miloslav Znojil
math-ph math.MP