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We propose a scheme for the demonstration of entanglement of two macroscopically separate free massive particles, which is based on the concept of dissociation time entanglement. Given two initially bound particles, their state at later time may be called dissociation-time entangled if it is described by a coherent superposition of components corresponding to different separation times. It can be probed by single particle interference in a coincidence arrangement. We investigate to what degree such verification of entanglement by correlated interferometry is possible with dispersive matter waves, and we discuss whether an implementation of the scheme by the controlled dissociation and subsequent atom-optical manipulation of ultracold molecules is realistic with current experimental technology. |