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(419) Production(s) de l'année 2017
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How active forces influence nonequilibrium glass transitions
Auteur(s): Berthier L., Flenner Elijah, Szamel G.
(Article) Publié:
New Journal Of Physics, vol. 19 p.125006 (2017)
Texte intégral en Openaccess :
Ref HAL: hal-01667079_v1
Ref Arxiv: 1708.04259
DOI: 10.1088/1367-2630/aa914e
WoS: 000424893800001
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
14 Citations
Résumé: Dense assemblies of self-propelled particles undergo a nonequilibrium form of glassy dynamics. Physical intuition suggests that increasing departure from equilibrium due to active forces fluidifies a glassy system. We falsify this belief by devising a model of self-propelled particles where increasing departure from equilibrium can both enhance or depress glassy dynamics, depending on the chosen state point. We analyze a number of static and dynamic observables and suggest that the location of the nonequilibrium glass transition is primarily controlled by the evolution of two-point static density correlations due to active forces. The dependence of the density correlations on the active forces varies non-trivially with the details of the system, and is difficult to predict theoretically. Our results emphasize the need to develop an accurate liquid state theory for nonequilibrium systems.
Commentaires: . Réf Journal: New J. Phys. 19, 125006 (2017)
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Granular materials flow like complex fluids
Auteur(s): Kou Binquan, Cao Yixin, Li Jindong, Xia Chengjie, Li Zhifeng, Dong Haipeng, Zhang Ang, Zhang Jie, Kob W., Wang Yujie
(Article) Publié:
Nature, vol. 551 p.360 (2017)
Texte intégral en Openaccess :
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THREE-DIMENSIONAL VISUALIZATION OF THE INTERNAL ARRANGEMENT OF ONCHOCERCAL (ONCHOCERCA VOLVULUS) NODULES USING HIGH-RESOLUTION MAGNETIC RESONANCE IMAGING
Auteur(s): Cardoso Maida, Chesnais Cedric B., Pion Sebastien D., Boussinesq Michel, Ben Naim Frederic, Goze-Bac C., Zanca M.
Conference: 65th Annual Meeting of the American-Society-of-Tropical-Medicine-and-Hygiene (ASTMH) (Atlanta, US, 2016-11-14)
Actes de conférence: AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE, vol. 95 p.350-351 (2017)
Ref HAL: hal-01665712_v1
WoS: WOS:000412851502641
Exporter : BibTex | endNote
Résumé: THREE-DIMENSIONAL VISUALIZATION OF THE INTERNAL ARRANGEMENT OF ONCHOCERCAL (ONCHOCERCA VOLVULUS) NODULES USING HIGH-RESOLUTION MAGNETIC RESONANCE IMAGING
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Janus Colloids Actively Rotating on the Surface of Water
Auteur(s): Wang X., In M., Blanc C., Würger Aloïs, Nobili M., Stocco A.
(Article) Publié:
Langmuir, vol. 33 p.13766 - 13773 (2017)
Texte intégral en Openaccess :
Ref HAL: hal-01664755_v1
DOI: 10.1021/acs.langmuir.7b02353
WoS: 000416877600006
Exporter : BibTex | endNote
21 Citations
Résumé: Biological or artificial microswimmers move performing trajectories of different kinds such as rectilinear, circular, or spiral ones. Here, we report on circular trajectories observed for active Janus colloids trapped at the air−water interface. Circular motion is due to asymmetric and nonuni form surface properties of the particles caused by fabrication. Motion persistence is enhanced by the partial wetted state of the Janus particles actively moving in two dimensions at the air−water interface. The slowing down of in plane and out of plane rotational diffusions is described and discussed.
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Algebraic Bethe Ansatz for the XXZ Gaudin Models with Generic Boundary
Auteur(s): Crampé N.
(Article) Publié:
Symmetry, Integrability And Geometry: Methods And Applications, vol. 13 p.094 (2017)
Texte intégral en Openaccess :
Ref HAL: hal-01664972_v1
Ref Arxiv: 1710.08490
DOI: 10.3842/SIGMA.2017.094
WoS: 000418099100001
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
4 Citations
Résumé: We solve the XXZ Gaudin model with generic boundary using the modified algebraic Bethe ansatz. The diagonal and triangular cases have been recovered in this general framework. We show that the model for odd or even lengths has two different behaviors. The corresponding Bethe equations are computed for all the cases. For the chain with even length, inhomogeneous Bethe equations are necessary. The higher spin Gaudin models with generic boundary is also treated.
Commentaires: Réf Journal: SIGMA 13 (2017), 094, 13 pages
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Casimir-Lifshitz force for nonreciprocal media and applications to photonic topological insulators
Auteur(s): Fuchs Sebastian, Lindel Frider, Krems Roman, Hanson George W., Antezza M., Buhmann Stefan Yoshi
(Article) Publié:
-Physical Review A Atomic, Molecular, And Optical Physics [1990-2015], vol. 96 p.062505 (2017)
Texte intégral en Openaccess :
Ref HAL: hal-01664518_v1
DOI: 10.1103/PhysRevA.96.062505
WoS: 000417919200004
Exporter : BibTex | endNote
9 Citations
Résumé: Based on the theory of macroscopic quantum electrodynamics, we generalize the expression of the Casimir force for nonreciprocal media. The essential ingredient of this result is the Green’s tensor between two nonreciprocal semi-infinite slabs, including a reflexion matrix with four coefficients that mixes optical polarizations. This Green’s tensor does not obey Lorentz’s reciprocity and thus violates time-reversal symmetry. The general result for the Casimir force is analyzed in the retarded and nonretarded limits, concentrating on the influences arising from reflections with or without change of polarization. In a second step, we apply our general result to a photonic topological insulator whose nonreciprocity stems from an anisotropic permittivity tensor, namely InSb. We show that there is a regime for the distance between the slabs where the magnitude of the Casimir force is tunable by an external magnetic field. Furthermore, the strength of this tuning depends on the orientation of the magnetic field with respect to the slab surfaces.
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