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Or to put it another way, the ground state wave function should be periodic in (Formula presented), since our starting potential was periodic
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The counterion distributions might not necessarily be rigid. A model of the temperature-assisted rearrangements of counterions between the minor and major grooves has been suggested [A. Cherstvy, A. A. Kornyshev, and S. Leikin, J. Phys. Chem. BJPCBFK1089-564710.1021/jp026343w 106, 13362 (2002)] offering an explanation of the temperature induced DNA condensation observed in solution of manganese salts
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