Videos

6-Vertex and O(1) Dense Loop Model: Correspondences of Razumov-Stroganov type

Presenter
January 17, 2012
Keywords:
  • lattice theory
  • lattice models in mechanics
  • SLE
  • vertex models
  • spin chains
  • quantum cluster algebra
  • scattering matrix
MSC:
  • 60K35
  • 60J65
  • 60J67
  • 60Jxx
  • 60-xx
  • 82-xx
  • 06-xx
  • 06-xx
  • 06-xx
Abstract
Razumov and Stroganov conjectured in 2001 a correspondence between the enumerations of Fully-packed loops (FPL) on a n x n square (related to the 6-Vertex Model), refined according to the link pattern, and the ground-state components of the Hamiltonian in the periodic XXZ Quantum Spin Chain at Delta=-1/2 (related to the O(1) Dense Loop Model, DLM). Extensions have been considered later on. In particular, Di Francesco in 2004 suggested a one-parameter generalization: on the `DLM side', the ground state of Hamiltonian H is replaced by the one of the Scattering Matrix S(t); on the `FPL side', one also considers the refinement on the last row. A rotational symmetrisation is required. We give a new extension, relating the ground state of the scattering matrix to a different enumeration of FPL's. This in turns provides unified proofs of both the original and the generalized conjecture. Work in collaboration with Luigi Cantini.