  Time-resolved photoelectron spectra are proposed for the measurement of
classical information recorded in the quantum phases of a molecular rotational
wave packet. Taking Li2 as a prototypical system, we show that an interference
arises from the electron-nuclei entanglement induced by the molecular
anisotropy. This phenomenon is used to transfer the information that was stored
initially in the nuclear rotational degree of freedom into the electronic
degree of freedom.
