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Bethe roots and refined enumeration of alternating-sign matrices

FREE ARTICLE Topical articles on The 75th Anniversary of the Bethe Ansatz

A V Razumov and Yu G Stroganov

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Part of Topical articles on The 75th Anniversary of the Bethe Ansatz

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 state considered, divided by the maximal component, coincide with the elementary symmetric polynomials in the corresponding Bethe roots. It is proved that these polynomials are equal to the numbers providing the refined enumeration of the alternating-sign matrices of order M+1 divided by the total number of the alternating-sign matrices of order M, for the chain of length 2M+1.


Keywords

integrable spin chains (vertex models)

quantum integrability (Bethe ansatz)

 

E-print Number: math-ph/0605004

Cited: by |

Refers: to

PACS

05.50.+q Lattice theory and statistics (Ising, Potts, etc.)

02.10.Ox Combinatorics; graph theory

02.10.Yn Matrix theory

MSC

82B20 Lattice systems (Ising, dimer, Potts, etc.) and systems on graphs

05Axx Enumerative combinatorics

Subjects

Mathematical physics

Statistical physics and nonlinear systems

Dates

Issue 07 (July 2006)

Received 20 May 2006, accepted for publication 23 June 2006

Published 13 July 2006



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