Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Harukuni Ikeda"'
Autor:
Harukuni Ikeda
Publikováno v:
SciPost Physics, Vol 17, Iss 4, p 103 (2024)
In one dimension, particles can not bypass each other. As a consequence, the mean-squared displacement (MSD) in equilibrium shows sub-diffusion $MSD(t)\sim t^{1/2}$, instead of normal diffusion $MSD(t)\sim t$. This phenomenon is the so-called single-
Externí odkaz:
https://doaj.org/article/61e395be0d1d4f2eab1646d79d1c7cb1
Autor:
Harukuni Ikeda
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033220 (2020)
We discuss the physics of crystals with small polydispersity near the jamming transition point. For this purpose, we introduce an effective single-particle model taking into account the nearest neighbor structure of crystals. The model can be solved
Externí odkaz:
https://doaj.org/article/1bc0b3c784324da485eb837a72da3ad2
Autor:
Harukuni Ikeda, Masanari Shimada
Publikováno v:
Physical review. E. 106(2-1)
Several mean-field theories predict that the Hessian matrix of amorphous solids converges the Wishart matrix in the limit of the large spatial dimensions d→∞. Motivated by these results, we calculate here the density of states of random packing o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fefe2a6e04f2e8c3364349ac5bcc975
https://pubmed.ncbi.nlm.nih.gov/36109905
https://pubmed.ncbi.nlm.nih.gov/36109905
Autor:
Harukuni Ikeda
Publikováno v:
The Journal of Chemical Physics. 158:056101
The fluctuations of the physical quantities play a central role to characterize the critical phenomena. Here, we report that the nature of the fluctuation highly depends on the control parameter near the jamming transition point $\varphi_J$. We show
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6adf5ab2d6f00449344e8fe5e167b814
https://doi.org/10.1063/5.0127064
https://doi.org/10.1063/5.0127064
Autor:
Harukuni Ikeda, Yi Hu, Grzegorz Szamel, Giulio Biroli, Patrick Charbonneau, Francesco Zamponi
Publikováno v:
Journal of Physical Chemistry B
Journal of Physical Chemistry B, American Chemical Society, 2021, 125 (23), pp.6244-6254. ⟨10.1021/acs.jpcb.1c02067⟩
Journal of Physical Chemistry B, American Chemical Society, 2021, 125 (23), pp.6244-6254. ⟨10.1021/acs.jpcb.1c02067⟩
The random Lorentz gas (RLG) is a minimal model of both percolation and glassiness, which leads to a paradox in the infinite-dimensional, $d\rightarrow\infty$ limit: the localization transition is then expected to be continuous for the former and dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::708a3cfb061bb31ea2d225d4ee25b71a
Autor:
Harukuni Ikeda
We perform numerical simulations of the jamming transition of non-spherical particles in two dimensions. In particular, we systematically investigate how the physical quantities at the jamming transition point behave when the shapes of the particle d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba1b32ba56053969eee3e9040f7e1659
http://arxiv.org/abs/2012.07294
http://arxiv.org/abs/2012.07294
Autor:
Harukuni Ikeda
Publikováno v:
Journal of Chemical Physics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a891cf06a34e9935f7f6d0a135ca6272
https://pubmed.ncbi.nlm.nih.gov/33003763
https://pubmed.ncbi.nlm.nih.gov/33003763
Autor:
Sungmin Hwang, Harukuni Ikeda
Publikováno v:
Physical Review E
We numerically study the relaxation dynamics of the single layer perceptron with the spherical constraint. This is the simplest model of neural networks and serves a prototypical mean-field model of both convex and non-convex optimization problems. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab63f78989b6636bf25699acd0677cb0
https://doi.org/10.1103/physreve.101.052308
https://doi.org/10.1103/physreve.101.052308
Autor:
Francesco Zamponi, Yi Hu, Harukuni Ikeda, Grzegorz Szamel, Eric I. Corwin, Patrick Charbonneau, Giulio Biroli
Publikováno v:
Physical Review E
Physical Review E, American Physical Society (APS), 2021, 103 (3), ⟨10.1103/PhysRevE.103.L030104⟩
Physical Review E, American Physical Society (APS), 2021, 103 (3), ⟨10.1103/PhysRevE.103.L030104⟩
The random Lorentz gas (RLG) is a minimal model of transport in heterogeneous media. It also models the dynamics of a tracer in a glassy system. These two perspectives, however, are fundamentally inconsistent. Arrest in the former is related to perco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb7fc1d52b0030eddb8006389fb0c0cf
http://arxiv.org/abs/2003.11179
http://arxiv.org/abs/2003.11179
Publikováno v:
Physical Review Letters
Physical Review Letters, American Physical Society, 2020, 124 (20), ⟨10.1103/PhysRevLett.124.208001⟩
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Physical Review Letters, American Physical Society, 2020, 124 (20), ⟨10.1103/PhysRevLett.124.208001⟩
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We introduce a new model to study the effect of surface roughness on the jamming transition. By performing numerical simulations, we show that for a smooth surface, the jamming transition density and the contact number at the transition point both in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65ad30ed0a1b82def4b46b7d60ccffc8
https://pubmed.ncbi.nlm.nih.gov/32501092
https://pubmed.ncbi.nlm.nih.gov/32501092