Is the 2D quantum spin-glass transition controlled by infinite randomness?

For the 2D transverse-field Edwards-Anderson model, H = -sum_<xy> J_xy sz_x sz_y - Gamma sum_x sx_x on the square lattice, the parity-even gap closes as L^-$z_e$ with finite z_e while the parity-odd gap Delta = E_0,odd - E_0,even has a fat-tailed distribution and closes faster than any power of $L$. Determine whether the odd gap obeys activated scaling $\ln(1/\Delta) \sim L^{\psi}$ with an ever-broadening distribution, as strong-disorder renormalization group predicts, and the value of $\psi$; and determine the scaling of the typical and average spin-glass susceptibility near Gamma_c, including any Griffiths divergence on the paramagnetic side. An answer gives $\psi$ (or excludes activated scaling) and the Griffiths exponents with error bars.

Strong-disorder renormalization group results checked against large-scale quantum Monte Carlo data for the full distributions of gaps and local susceptibilities at and near $\Gamma_{c}$.