One- and two-particle spectral gap identities for the symmetric inclusion process and related models
This paper establishes that while the spectral gap of the conservative symmetric inclusion process generally deviates from the single-particle gap outside the log-concave regime, the identity universally holds for the non-conservative variant, with the authors providing sharp bounds and a two-particle gap identity for the former case using refined Dirichlet form comparisons and slow-fast system analysis.