Spectroscopic evidences for the spontaneous symmetry breaking at the SO(5) deconfined critical point of J - Q 3 model
This study used large-scale quantum Monte Carlo simulations to investigate the dynamical spectra of spin and bond operators at the deconfined critical point of the J-Q3 model. The results revealed four gapless transverse modes on either side of the transition, providing direct evidence for an emergent SO(5) symmetry that spontaneously breaks down to O(4). This supports a weakly first-order phase transition scenario.