D. Oblak

Mesoscopic atomic entanglement for precision measurements beyond the standard quantum limit

P. Windpassinger, E. Polzik, J. Appel, 2008, Proceedings of the National Academy of Sciences.

Spin squeezing of atomic ensembles by multicolor quantum nondemolition measurements

M. Saffman, J. Appel, D. Oblak, 2009 .