Yang-Baxter equation (YBE)

수학노트
http://bomber0.myid.net/ (토론)님의 2009년 8월 10일 (월) 22:59 판
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introduction
  • exact solvability of many models is explained by commuting transfer matrices
  • manifestations of Yang-Baxter equation
    • factorizable S-matrix

 

 

integrability of a model
  • in the space of couplings a submanifold exists, such as that the transfer matrices corresponding to any two points P and P' on it commute
  • characterized by a set of equations on the Boltzmann weights
    • this set of equations is called the Yang Baxter equation
  • solutions to Yang-Baxter equation can lead to a construction of integrable models

 

 

 

transfer matrix
  • transfer matrix is builtup from matrices of  Boltzmann weights
  • we need the trasfer matrices coming from different set of Boltzman weights commute 
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Bethe ansatz
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YBE for vertex models
  • Yang-Baxter equation
  • conditions satisfied by the Boltzmann weights of vertex models

 

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