Analytical predictions and MPS simulations show that magnetic fields or single-ion anisotropy can probe spinon interactions in the critical phase of the spin-1 bilinear-biquadratic chain.
Haldane, Continuum dynamics of the 1-D Heisenberg antiferromagnet: Identification with the O(3) nonlinear sigma model, Physics Letters A93, 464 (1983)
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Probing spinon interactions in the spin-1 bilinear-biquadratic chain
Analytical predictions and MPS simulations show that magnetic fields or single-ion anisotropy can probe spinon interactions in the critical phase of the spin-1 bilinear-biquadratic chain.