Ultrastable jammed sphere packings with a wide range of particle dispersities
Fuente:
arXiv
Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908487406059520 |
|---|---|
| author | Hoy, Robert S. |
| author_facet | Hoy, Robert S. |
| contents | We show that for a standard continuously-polydisperse model with particle-diameter distribution $P(σ) \propto σ^{-3}$ and polydispersity index $Δ$, employing a combination of standard SWAP moves and transient degree of freedom (TDOF) moves during a Lubachevsky-Stillinger-like particle-growth process dramatically increases the generated packings' jamming densities $ϕ_{\rm J}(Δ)$ and coordination numbers $Z_{\rm J}(Δ)$, for a wide range of $Δ$. The fractional increase in $ϕ_{\rm J}(Δ)$ obtained by employing these moves first increases rapidly with $Δ$, then plateaus at $6-7\%$ over the range $0.10 \lesssim Δ\leq 50$; the obtained $ϕ_{\rm J}$ are as high as $0.747$ (for $Δ= 0.50$). These density increases are achieved without producing clearly-noticeable crystallization or increased fractionation, despite the fact that the packings are quite hyperstatic for all $Δ> 0$. SWAP and TDOF moves also reduce packings' rattler populations by as much as 99% and increase their bulk moduli by as much as 80%. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_16521 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultrastable jammed sphere packings with a wide range of particle dispersities Hoy, Robert S. Soft Condensed Matter We show that for a standard continuously-polydisperse model with particle-diameter distribution $P(σ) \propto σ^{-3}$ and polydispersity index $Δ$, employing a combination of standard SWAP moves and transient degree of freedom (TDOF) moves during a Lubachevsky-Stillinger-like particle-growth process dramatically increases the generated packings' jamming densities $ϕ_{\rm J}(Δ)$ and coordination numbers $Z_{\rm J}(Δ)$, for a wide range of $Δ$. The fractional increase in $ϕ_{\rm J}(Δ)$ obtained by employing these moves first increases rapidly with $Δ$, then plateaus at $6-7\%$ over the range $0.10 \lesssim Δ\leq 50$; the obtained $ϕ_{\rm J}$ are as high as $0.747$ (for $Δ= 0.50$). These density increases are achieved without producing clearly-noticeable crystallization or increased fractionation, despite the fact that the packings are quite hyperstatic for all $Δ> 0$. SWAP and TDOF moves also reduce packings' rattler populations by as much as 99% and increase their bulk moduli by as much as 80%. |
| title | Ultrastable jammed sphere packings with a wide range of particle dispersities |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2506.16521 |