Abstract
We study structural aspects of the Ablowitz-Ladik (AL) hierarchy in the light of its realization as a two-component reduction of the two-dimensional Toda hierarchy, and establish new results on its connection to the Gromov-Witten theory of local CP1. We first of all elaborate on the relation to the Toeplitz lattice and obtain a neat description of the Lax formulation of the AL system. We then study the dispersionless limit and rephrase it in terms of a conformal semisimple Frobenius manifold with non-constant unit, whose properties we thoroughly analyze. We build on this connection along two main strands. First of all, we exhibit a manifestly local bi-Hamiltonian structure of the Ablowitz-Ladik system in the zero-dispersion limit. Second, we make precise the relation between this canonical Frobenius structure and the one that underlies the Gromov-Witten theory of the resolved conifold in the equivariantly Calabi-Yau case; a key role is played by Dubrovin's notion of "almost duality" of Frobenius manifolds. As a consequence, we obtain a derivation of genus zero mirror symmetry for local CP1 in terms of a dual logarithmic Landau-Ginzburg model.
Original language | English |
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Pages (from-to) | 2156-2167 |
Number of pages | 12 |
Journal | Physica D: Nonlinear Phenomena |
Volume | 241 |
Issue number | 23-24 |
Early online date | 28 Sept 2011 |
DOIs | |
Publication status | Published - 1 Dec 2012 |
Keywords
- 2D-Toda
- Ablowitz-Ladik
- Gromov-Witten
- Integrable hierarchies
- Mirror symmetry
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Condensed Matter Physics