Author(s): Takato Yoshimura, Žiga Krajnik, Alvise Bastianello, and Enej Ilievski The quantum XXZ spin-$1/2$ chain features non-Gaussian spin current fluctuations in the regime of easy-axis anisotropy. Using ballistic macroscopic fluctuation theory, we derive the exact asymptotic probability distribution of typical spin-current fluctuations in thermal equilibrium at zero average … [Phys. Rev. Lett. 137, 086302] Published Mon Aug 17, 2026