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Bifurcation at the c=3/2 Takhtajan-Babujian point to the c=1 critical lines

Atsuhiro Kitazawa·Kiyohide Nomura
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Abstract

We study the S=1 quantum spin chains with bilinear, biquadratic, plus bond alternation in the vicinity of the S=1 Takhtajan-Babujian model. Transition line between the Haldane and the dimer phases are determined numerically. To see the crossover behavior from c=3/2 (k=2 SU(2) WZW model) at the Takhtajan-Babujian point to c=1 (k=1 SU(2) WZW model), we calculate the conformal anomaly c and scaling dimensions of the primary fields on the transition line.

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Atsuhiro Kitazawa, Kiyohide Nomura. 1998-11-29. Bifurcation at the c=3/2 Takhtajan-Babujian point to the c=1 critical lines. https://doi.org/10.1103/physrevb.59.11358

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