FATEEV-ZAMOLODCHIKOV SPIN CHAIN: EXCITATION SPECTRUM, COMPLETENESS AND THERMODYNAMICS
1994 ◽
Vol 09
(28)
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pp. 4921-4947
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The sector of zero ZN charge is studied for the ferromagnetic (FM) and antiferromagnetic (AFM) version of the (ZN×Z2)-invariant Fateev-Zamolodchikov quantum spin chain. We conjecture that the relevant Bethe ansatz equations should admit, besides the usual stringlike solutions, exceptional multiplets, and a number of nonphysical solutions. Once the physical ones are identified, we show how completeness and the gapless excitation spectrum can be obtained. The central charge is computed from the specific heat and found to be [Formula: see text] (FM) and c=1 (AFM).
2006 ◽
Vol 20
(04)
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pp. 495-504
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1999 ◽
Vol 196-197
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pp. 430-432
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1984 ◽
Vol 80
◽
pp. 146-155
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1999 ◽
Vol 13
(24n25)
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pp. 2973-2985
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