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Particle swaps can drastically accelerate dynamics in glass. The mechanism isexpected to be vital for a fundamental understanding of glassy dynamics. Toextract defining features, we propose a partial swappability with a fraction{\phi_s} of swap-initiating particles, which can only swap locally with eachother or with regular particles. We focus on the swap-dominating regime. At alltemperatures studied, particle diffusion coefficients scale with {\phi_s} inunexpected power laws with temperature-dependent exponents, consistent with thekinetic picture of glass transition. At small {\phi_s}, swap-initiators,becoming defect particles, induce remarkably typical glassy dynamics of regularparticles. This supports defect models of glass.

Diffusion coefficient power laws and defect-driven glassy dynamics in swap acceleration