taeto Posted April 19, 2020 Share Posted April 19, 2020 (edited) Abstract Complex bound states of magnetic excitations, known as Bethe strings, were predicted almost a century ago to exist in one-dimensional quantum magnets. The dispersions of the string states have so far remained the subject of intense theoretical studies. Here, by performing neutron scattering experiments on the one-dimensional Heisenberg–Ising antiferromagnet SrCo2V2O8 in high longitudinal magnetic fields, we reveal in detail the dispersion relations of the string states over the full Brillouin zone, as well as their magnetic field dependencies. Furthermore, the characteristic energy, the scattering intensity and linewidth of the observed string states exhibit excellent agreement with our precise Bethe–ansatz calculations. Our results establish the important role of string states in the quantum spin dynamics of one-dimensional systems, and will invoke studies of their dynamical properties in more general many-body systems. Bera, A.K., Wu, J., Yang, W. et al. Dispersions of many-body Bethe strings. Nat. Phys. (2020). Edited April 19, 2020 by taeto Link to comment Share on other sites More sharing options...
Mordred Posted April 20, 2020 Share Posted April 20, 2020 You might want to include a link to the paper. Here is the Arxiv https://arxiv.org/abs/1909.00146 Link to comment Share on other sites More sharing options...
giftmax Posted April 21, 2020 Share Posted April 21, 2020 tanx good talk usefull for me ... Link to comment Share on other sites More sharing options...
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