generalfactneutralWindowed thinning achieves query complexity of O(κ^(1/2)d(d log κ + log 1/ε)) gradient queries for bouncy particle sampler and O(κd^(1/4)(d log κ + log 1/ε)) full-gradient equivalents for ZigzagMachine Learning02 Aug 2026http://arxiv.org/abs/2607.28413v1