SubstrateCommons/coefficient-walks

Float coefficient walks: Monte Carlo walks stored as the unquantised float32 coefficients of their walkers' series on the bridge basis (positions, and for walled substrates the wall contact), before the band truncation and the rounding a replay pack applies. They are the reference against which the encoding of a replay pack is measured: the error of truncating at K bands and the error of rounding each band to its bits. Read one with dmipy_sim.coefficient_walk.CoefficientWalk.load(path); manifest.json holds the sha256 of every file.

file	substrate	walkers	duration	bands
walks/cactus_bundle00000_20k.safetensors	CACTUS bundle 00000, the first 20,000 walkers of SubstrateCommons/cactus-axons packs/cactus_bundle00000_100ms.rpk	20,000	100 ms	256
walks/cyl10.safetensors	cylinder, 10 um diameter	20,000	100 ms	2000
walks/cyl2.safetensors	cylinder, 2 um diameter	20,000	100 ms	2000
walks/cyl5.safetensors	cylinder, 5 um diameter	20,000	100 ms	2000
walks/free.safetensors	free diffusion	20,000	100 ms	2000

The free and cylinder walks are at D = 2 × 10⁻⁹ m²/s with 2,000 bands over 100 ms; the CACTUS subset is the first 20,000 walkers of the bundle's walk at D = 1.7 × 10⁻⁹ m²/s, 256 bands, with its wall contact and field series.

Licence

The walks are distributed under CC-BY-NC-SA-4.0 OR LicenseRef-Commercial (see LICENSING.md): CC BY-NC-SA 4.0 for research and non-profit use, a commercial licence on request. The CACTUS geometry keeps its own licence (MIT, Villarreal-Haro et al. 2023).