Mode-Invisibility as a non-Destructive Probe of Entangled QUBIT-CAT   States
  We investigate the dynamics for a two level atomic system entangled to coherent states using the recently developed mode invisibility technique. Using a quantum 2-level probe, we demonstrate a way to non-destructively measure a number of properties between a qubit entangled with a generalized CAT state, including the amplitude of the coherent state, the location and relative excitation of the qubit, and the von Neumann entropy. Our results indicate a connection between this last quantity and the interferometric phase shift of the probe, thereby suggesting a possible way to experimentally measure entanglement non-destructively. 
Paulina Corona-Ugalde, Marvellous Onuma-Kalu, and Robert B. Mann
quant-ph