Breitenbach

Quantum-nondemolition measurement of small photon numbers and the preparation of number states.

Schack, Schenzle, Breitenbach, 1992, Physical review. A, Atomic, molecular, and optical physics.

Quantum Statistics of the Squeezed Vacuum by Measurement of the Density Matrix in the Number State Representation.

V. Pereira, Müller, Mlynek, 1996, Physical review letters.