Non-classical properties of quantum wave packets propagating in a   Kerr-like medium
  We investigate non-classical effects such as fractional revivals, squeezing and higher-order squeezing of photon-added coherent states propagating through a Kerr-like medium.The Wigner functions corresponding to these states at the instants of fractional revivals are obtained, and the extent of non-classicality quantified. 
C. Sudheesh, S. Lakshmibala, and V. Balakrishnan