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C. Gneiting and K. Hornberger
Bell test for the free motion of material particles
Phys. Rev. Lett 101, 260503 (2008)


We present a scheme to establish non-classical correlations in the motion of two macroscopically separated massive particles without resorting to entanglement in their internal degrees of freedom. It is based on the dissociation of a diatomic molecule with two temporally separated Feshbach pulses generating a motional state of two counter-propagating atoms that is capable of violating a Bell inequality by means of correlated single particle interferometry. We evaluate the influence of dispersion on the Bell correlation, showing it to be important but manageable in a proposed experimental setup. The latter employs a molecular BEC of fermionic Lithium atoms, uses laser-guided atom interferometry, and seems to be within the reach of present-day technology.

(4 pages, 1 figure)   [pdf, journal, arXiv:0807.1448 ]

doi:10.1103/PhysRevLett.101.260503            (c) The American Physical Society