  Quantum loop and dimer models are archetypal examples of correlated systems
with local constraints. Obtaining generic solutions for these models is
difficult due to the lack of controlled methods to solve them in the
thermodynamic limit. Nevertheless, these solutions are of immediate relevance
to both statistical and quantum field theories, as well as the rapidly growing
experiments in Rydberg atom arrays and quantum moir\'e materials, where the
interplay between correlation and local constraints gives rise to a plethora of
novel phenomena. In a recent work [X. Ran, Z. Yan, Y.-C. Wang, et al,
arXiv:2205.04472 (2022)], it was found through sweeping cluster quantum Monte
Carlo (QMC) simulations and field theory analysis that the triangular lattice
quantum loop model (QLM) hosts a rich ground state phase diagram with lattice
nematic, vison plaquette (VP) crystals, and the $\mathbb{Z}_2$ quantum spin
liquid (QSL) close to the Rokhsar-Kivelson point. Here, we focus on the
continuous quantum critical point separating the VP and QSL phases and
demonstrate via both static and dynamic probes in QMC simulations that this
transition is of the (2+1)D cubic* universality. In this transition, the
fractionalized visons in QSL condense to give rise to the crystalline VP phase,
while leaving their trace in the anomalously large anomalous dimension exponent
and pronounced continua in the dimer and vison spectra compared with those at
the conventional cubic or O(3) quantum critical points.
