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Ground state representation of the infinite one-dimensional Heisenberg ferromagnet

II. An explicit plancherel formula

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Abstract

In its ground state representation, the infinite, spin 1/2 Heisenberg chain provides a model for spin wave scattering, which entails many features of the quantum mechanicalN-body problem. Here, we give a complete eigenfunction expansion for the Hamiltonian of the chain in this representation, forall numbers of spin waves. Our results resolve the questions of completeness and orthogonality of the eigenfunctions given by Bethe for finite chains, in the infinite volume limit.

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References

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Communicated by E. Lieb

Research supported in part by NSF Grant No. MCS-76-05857

Research supported in part by NSF Grant No. MCS-74-07313-A02

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Babbitt, D., Thomas, L. Ground state representation of the infinite one-dimensional Heisenberg ferromagnet. Commun.Math. Phys. 54, 255–278 (1977). https://doi.org/10.1007/BF01614088

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  • DOI: https://doi.org/10.1007/BF01614088

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