System plus reservoir approach to quantum Brownian motion of a rod-like   particle
  Quantum Brownian motion of a rod-like particle is investigated in the frame work of system plus reservoir model. The quantum mechanical and classical limit for both translational and rotational motions are discussed. Correlation functions, fluctuation-dissipation relations and mean squared values of translational and rotational motions are obtained. 
Z. Nasr and F. Kheirandish
quant-ph