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Grain Boundary Scars and Spherical Crystallography

We describe experimental investigations of the structure of two-dimensional spherical crystals. The crystals, formed by beads self-assembled on water droplets in oil, serve as model systems for… Expand

Topology and dynamics of active nematic vesicles

- F. Keber, E. Loiseau, +6 authors A. Bausch
- Materials Science, Physics
- Science
- 5 September 2014

Liquid crystals on a deformable substrate The orientation of the molecules in a liquid crystalline material will change in response to either changes in the substrate or an external field. This is… Expand

Interacting topological defects on frozen topographies

- M. Bowick, D. Nelson, A. Travesset
- Physics
- 23 November 1999

We propose and analyze an effective free energy describing the physics of disclination defects in particle arrays constrained to move on an arbitrary two-dimensional surface. At finite temperature… Expand

Defect annihilation and proliferation in active nematics.

- L. Giomi, M. Bowick, X. Ma, M. Marchetti
- Physics, Medicine
- Physical review letters
- 19 March 2013

Liquid crystals inevitably possess topological defect excitations generated through boundary conditions, through applied fields, or in quenches to the ordered phase. In equilibrium, pairs of defects… Expand

Crystalline order on a sphere and the generalized Thomson problem.

- M. Bowick, A. Cacciuto, D. Nelson, A. Travesset
- Physics, Medicine
- Physical review letters
- 10 June 2002

We attack the generalized Thomson problem, i.e., determining the ground state energy and configuration of many particles interacting via an arbitrary repulsive pairwise potential on a sphere via a… Expand

High-temperature strings

- M. Bowick, S. Giddings
- Physics
- 23 October 1989

Abstract The microcanonical density of states for a weakly interacting gas of strings compactified on a torus is computed in the limit of large energy, taking into account conservation of winding… Expand

The solution space of the unitary matrix model string equation and the Sato Grassmannian

- K. Anagnostopoulos, M. Bowick, A. Schwarz
- Physics, Mathematics
- 21 December 1991

The space of all solutions to the string equation of the symmetric unitary one-matrix model is determined. It is shown that the string equation is equivalent to simple conditions on pointsV1 andV2 in… Expand

Two-dimensional matter: order, curvature and defects

Many systems in nature and the synthetic world involve ordered arrangements of units on two-dimensional surfaces. We review here the fundamental role payed by both the topology of the underlying… Expand

Universal scaling of the tail of the density of eigenvalues in random matrix models

Abstract Large random matrices have eigenvalue density distributions limited to a finite support. Near the endpoint of the support, when the size N of the matrices is large, one can study a scaling… Expand

Direct visualization of dislocation dynamics in grain-boundary scars

- Peter Lipowsky, M. Bowick, J. Meinke, D. Nelson, A. Bausch
- Materials Science, Medicine
- Nature materials
- 22 March 2005

Mesoscale objects with unusual structural features may serve as the analogues of atoms in the design of larger-scale materials with novel optical, electronic or mechanical behaviour. In this paper we… Expand

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