A spectral gap throughout the high-temperature Sherrington–Kirkpatrick phase

For every fixed inverse temperature $0<\beta <1$, we prove that the unscaled spectral gap of single-site heat-bath dynamics for the zero-field Gaussian Sherrington–Kirkpatrick model is bounded away from zero with probability tending to one over the disorder. Equivalently, the Gibbs law satisfies a dimension-free Poincaré inequality for all functions.