The Van der Waals interactions and the photoelectric effect in   noncommutative quantum mechanics
  We calculate the long-range Vanderwaals force and the photoelectric cross section in a \nc set up. While we argue that non-commutativity effects could not be discerned for the Vanderwaals interactions, the result for the photoelectric effect shows deviation from the usual commutative one, which in principle can be used to put bounds on the space-space non-commutativity parameter. 
K. Li (Hangzhou Normal University) and N. Chamoun (ICTP & Hiast)