Bifurcation at the c=3/2 Taktajan-Babujian point to the c=1 critical line

Article

关键词: QUANTUM SPIN CHAINS;    ANTIFERROMAGNETIC HEISENBERG-CHAINS;    CONFORMALLY INVARIANT THEORIES;    TWISTED BOUNDARY-CONDITIONS;    GROUND-STATE PROPERTIES;    BOND ALTERNATION;    CRITICAL EXPONENTS;    SYMMETRY-BREAKING;    ARBITRARY SPINS;    CENTRAL CHARGE;   

DOI  :  10.1103/PhysRevB.59.11358

来源: SCIE

【 摘 要 】

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 is determined numerically. To see the crossover behavior from c=3/2 [k=2 SU(2) Weiss-Zumino-Witten (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. [S0163-1829(99)01717-8].

【 授权许可】

Free