Bethe roots and refined enumeration of alternating-sign matrices

A V Razumov, Yu G Stroganov
2006 Journal of Statistical Mechanics: Theory and Experiment  
The properties of the most probable ground state candidate for the XXZ spin chain with the anisotropy parameter equal to -1/2 and an odd number of sites is considered. Some linear combinations of the components of the considered state, divided by the maximal component, coincide with the elementary symmetric polynomials in the corresponding Bethe roots. It is proved that those polynomials are equal to the numbers providing the refined enumeration of the alternating-sign matrices of order M+1
more » ... ded by the total number of the alternating-sign matrices of order M, for the chain of length 2M+1.
doi:10.1088/1742-5468/2006/07/p07004 fatcat:thltxlmbwvf2ljzbhlf7y22ibi