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10 papers · 2 filters
Topological Defects in Spherical Nematics
Homin Shin, Mark J. Bowick, Xiangjun Xing
We study the organization of topological defects in a system of nematogens confined to the two-dimensional sphere (S^2). We first perform Monte Carlo simulations of a fluid system…
Nonlinear Elasticity, Fluctuations and Heterogeneity of Nematic Elastomers
Xiangjun Xing, Leo Radzihovsky
Liquid crystal elastomers realize a fascinating new form of soft matter that is a composite of a conventional crosslinked polymer gel (rubber) and a liquid crystal. These {\em soli…
Bubble Raft Model for a Paraboloidal Crystal
Mark J. Bowick, Luca Giomi, Homin Shin +1
We investigate crystalline order on a two-dimensional paraboloid of revolution by assembling a single layer of millimeter-sized soap bubbles on the surface of a rotating liquid, th…
Hydrodynamics of self-propelled hard rods
Aparna Baskaran, M. Cristina Marchetti
Motivated by recent simulations and by experiments on aggregation of gliding bacteria, we study a model of the collective dynamics of self-propelled hard rods on a substrate in two…
Kinetic Theory of Response Functions for the Hard Sphere Granular Fluid
Aparna Baskaran, James W. Dufty, J. Javier Brey
The response functions for small spatial perturbations of a homogeneous granular fluid have been described recently. In appropriate dimensionless variables, they have the form of s…
Topology of Smectic Order on Compact Substrates
Xiangjun Xing
Smectic orders on curved substrates can be described by differential forms of rank one (1-forms), whose geometric meaning is the differential of the local phase field of density mo…