Collapse and Revival for a slightly anharmonic Hamiltonian
  The effect of quantum collapse and revival is a fascinating interference phenomenon. In this paper the phenomenon is demonstrated analytically and numerically for a simple system, a slightly anharmonic Hamiltonian. The initial wave-function is a displaced ground state of a harmonic oscillator. Possible experimental realizations for cold atoms are discussed in detail. 
Alexandra Bakman and Hagar Veksler and Shmuel Fishman
quant-ph