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The dimerized spin-1 Ising chain with both longitude and transverse single-ion anisotropies D z and D x is solved exactly by means of a mapping to the spin-12 Ising chain with the alternating transverse fields and the Jordan–Wigner transformation. The analytical expressions of the quasi-particles’ spectra Λ k , the minimal energy gap Δ 0 for exciting a fermion quasi-particle,...
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