Fluctuations and the existence of potential in dissipative semiclassical   systems
  We examine the weak noise limit of an overdamped dissipative system within a semiclassical description and show how quantization influences the growth and decay of fluctuations of the thermally equilibrated systems. We trace its origin in a semiclassical counterpart of the generalized potential for the dissipative system. 
Bidhan Chandra Bag and Deb Shankar Ray