Abstract
Within the Ginzburg–Landau theory applied to a planar array of chains, characterizedby a real order parameter, the inter-chain fluctuations are taken into accountexactly. So, the ‘linear chain approximation’ is replaced by a rigorous treatment.The single-chain problem is addressed taking advantage of a precise and simplenon-perturbative solution of the Schrödinger equation for the anharmonic oscillator.
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