@article{2004-widera-bloch-phys-rev-lett-v92-p160406,
	Abstract = {We report on a matter wave interferometer realized with entangled pairs of trapped 87Rb atoms. Each pair of atoms is confined at a single site of an optical lattice potential. The interferometer is realized by first creating a coherent spin superposition of the two atoms and then tuning the interstate scattering length via a Feshbach resonance. The selective change of the interstate scattering length leads to an entanglement dynamics of the two-particle state that can be detected in a Ramsey interference experiment. This entanglement dynamics is employed for a precision measurement of atomic interaction parameters. Furthermore, the interferometer allows us to separate lattice sites with one or two atoms in a nondestructive way.},
	Author = {Widera, A. AND Mandel, O. AND Greiner, M. AND Kreim, S. AND Hänsch, T. W. AND Bloch, I.},
	Journal = {Phys. Rev. Lett.},
	Pages = {160406},
	Title = {{Entanglement Interferometry for Precision Measurement of Atomic Scattering Properties  }},
	Volume = {92},
	Year = {2004}
}