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

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.

10 pages, 8 figures

References in corpus (1)

• Phase Diagrams of S=3/2, 2 XXZ Spin Chains with Bond-Alternation

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