A local energy defect in a 1D Hubbard chain can resonantly convert a bound electron pair into a dissociated electron plus a localized electron, and back, with near-unit efficiency in tuned parameter windows.
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Defect-Mediated Pairing and Dissociation of Strongly Correlated Electrons in Low Dimensional Lattices: The Quantum Taxi Effect
A local energy defect in a 1D Hubbard chain can resonantly convert a bound electron pair into a dissociated electron plus a localized electron, and back, with near-unit efficiency in tuned parameter windows.