Bosonic representation of spin operators in the field-induced critical phase of spin-1 Haldane chains
نویسنده
چکیده
A bosonized-field-theory representation of spin operators in the uniform-field-induced Tomonaga-Luttinger-liquid (TLL) phase in spin-1 Haldane chains is formulated by means of the non-Abelian (Tsvelik’s Majorana fermion theory) and the Abelian bosonizations and Furusaki-Zhang technique [Phys. Rev. B 60, 1175 (1999)]. It contains massive magnon fields as well as massless boson fields. From it, asymptotic forms of spin correlation functions in the TLL phase are completely determined. We also discuss, in some detail, how the symmetry operations of the Haldane chains are translated in the low-energy effective theory. PACS numbers: 75.10.Jm,75.10.Pq,75.50.Ee Bosonic representation of spin operators 2
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