Padmanabhan, T.Narlikar, J. V.2012-03-032012-03-031981-08-17http://hdl.handle.net/11007/174A model theory for quantized gravity is discussed where only selected degrees of freedom are quantized. The concept of stationary states is introduced. It is shown that the Planck length arises as a lower bound to the space—time length scale in a natural way.enStationary statesQuantum gravity modelSpace—time length scaleArticle