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Article overview
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Experimental evidences of the Gardner phase in a granular glass | | Antoine Seguin
; Olivier Dauchot
; | | Date: |
3 May 2016 | | Abstract: | Analyzing the dynamics of a vibrated bi-dimensional packing of bidisperse
granular discs below jamming, we provide evidences of a Gardner phase deep into
the glass phase. To do so we perform several independent compression cycles
within the same glass and show that the particles select different average
vibrational positions at each cycle, while the neighborhood structure remains
unchanged. We compute the mean square displacement as a function of the packing
fraction and compare it with the average separation between the cages obtained
for different compression cycles. Our results are fully compatible with recent
numerical observations obtained for a mean field model of glass as well as for
hard spheres in finite dimension. We also characterize the distribution of the
cage order parameters. Here we note several differences from the numerical
results, which could be attributed to activated processes and cage
heterogeneities. | | Source: | arXiv, 1605.0827 | | Services: | Forum | Review | PDF | Favorites | |
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