2022

Houston, Alexander J. H. and Alexander, Gareth P. (2022) Defect loops in three-dimensional active nematics as active multipoles. Physical Review E, 105 (6). L062601. doi:10.1103/PhysRevE.105.L062601

Alexander, Gareth P. and Kamien, Randall D. (2022) Entanglements and Whitehead products : generalizing Kleman's construction to higher-dimensional defects. Liquid Crystals Reviews . pp. 1-0. doi:10.1080/21680396.2022.2067257

2021

Kole, S. J., Alexander, Gareth P., Ramaswamy, Sriram and Maitra, Ananyo (2021) Layered chiral active matter : beyond odd elasticity. Physical Review Letters, 126 (24). 248001 . doi:10.1103/PhysRevLett.126.248001

Pollard, Joseph and Alexander, Gareth P. (2021) Intrinsic geometry and director reconstruction for three-dimensional liquid crystals. New Journal of Physics, 23 (6). 063006. doi:10.1088/1367-2630/abfdf4

2020

Binysh, Jack, Pollard, Joseph and Alexander, Gareth P. (2020) Geometry of bend : singular lines and defects in twist-bend nematics. Physical Review Letters, 125 (4). 047801 . doi:10.1103/PhysRevLett.125.047801

Alexander, Gareth P. and Machon, Thomas (2020) A Björling representation for Jacobi fields on minimal surfaces and soap film instabilities. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 476 (2238). 20190903. doi:10.1098/rspa.2019.0903

Binysh, Jack, Kos, Žiga, Čopar, Simon, Ravnik, Miha and Alexander, Gareth P. (2020) Three-dimensional active defect loops. Physical Review Letters, 124 (8). 088001 . doi:10.1103/PhysRevLett.124.088001

2019

Pollard, Joseph, Posnjak, Gregor, Copar, Simon, Musevic, Igor and Alexander, Gareth P. (2019) Point defects, topological chirality, and singularity theory in cholesteric liquid-crystal droplets. Physical Review X, 9 (2). 021004. doi:10.1103/PhysRevX.9.021004

Binysh, Jack, Whitfield, Carl A. and Alexander, Gareth P. (2019) Stable and unstable vortex knots in excitable media. Physical Review E, 99 (1). 012211. doi:10.1103/PhysRevE.99.012211

2018

Machon, Thomas and Alexander, Gareth P. (2018) Woven nematic defects, skyrmions, and the Abelian sandpile model. Physical Review Letters, 121 (23). 237801. doi:10.1103/PhysRevLett.121.237801

Binysh, Jack and Alexander, Gareth P. (2018) Maxwell's theory of solid angle and the construction of knotted fields. Journal of Physics A: Mathematical and Theoretical, 51 (38). 385202. doi:10.1088/1751-8121/aad8c6

2017

Khoromskaia, Diana and Alexander, Gareth P. (2017) Vortex formation and dynamics of defects in active nematic shells. New Journal of Physics, 19 (10). 103043. doi:10.1088/1367-2630/aa89aa

Matsumoto, Elisabetta A., Kamien, Randall D. and Alexander, Gareth P. (2017) Straight round the twist : frustration and chirality in smectics-A. Interface Focus, 7 (4). 20160118. doi:10.1098/rsfs.2016.0118

Whitfield, Carl A. , Adhyapak, Tapan Chandra, Tiribocchi, Adriano, Alexander, Gareth P., Marenduzzo, Davide and Ramaswamy, Sriram (2017) Hydrodynamic instabilities in active cholesteric liquid crystals. The European Physical Journal E, 40 (50). pp. 1-16.

Papavassiliou, Dario and Alexander, Gareth P. (2017) Exact solutions for hydrodynamic interactions of two squirming spheres. Journal of Fluid Mechanics, 813 . pp. 618-646. doi:10.1017/jfm.2016.837

2016

Machon, Thomas and Alexander, Gareth P. (2016) Global defect topology in nematic liquid crystals. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 472 (2191). doi:10.1098/rspa.2016.0265

Machon, Thomas, Alexander, Gareth P., Goldstein, Raymond E. and Pesci, Adriana I. (2016) Instabilities and solitons in minimal strips. Physical Review Letters, 117 (1). 017801 . doi:10.1103/PhysRevLett.117.017801

Machon, Thomas and Alexander, Gareth P. (2016) Umbilic lines in orientational order. Physical Review X, 6 (1). pp. 1-19. 011033. doi:10.1103/PhysRevX.6.011033

2015

Khoromskaia, Diana and Alexander, Gareth P. (2015) Motility of active fluid drops on surfaces. Physical Review E, 92 (6). 062311 . doi:10.1103/PhysRevE.92.062311

Papavassiliou, Dario and Alexander, Gareth P. (2015) The many-body reciprocal theorem and swimmer hydrodynamics. EPL (Europhysics Letters), Volume 110 (Number 4). pp. 1-6. 44001. doi:10.1209/0295-5075/110/44001

Pesci, Adriana I., Goldstein, Raymond E., Alexander, Gareth P. and Moffatt, H. K. (2015) Instability of a Möbius strip minimal surface and a link with systolic geometry. Physical Review Letters, 114 . pp. 1-5. 127801.

2014

Machon, Thomas and Alexander, Gareth P. (2014) Knotted defects in nematic liquid crystals. Physical Review Letters, Volume 113 (Number 2). doi:10.1103/PhysRevLett.113.027801

Michieletto, Davide, Orlandini, Enzo, Alexander, Gareth P. and Turner, Matthew S. (2014) Threading dynamics of ring polymers in a gel. ACS Macro Letters, Volume 3 (Number 3). pp. 255-259. doi:10.1021/mz500060c

Beller, Daniel A., Machon, Thomas, Čopar, Simon, Sussman, Daniel M., Alexander, Gareth P., Kamien, Randall and Mosna, Ricardo (2014) Geometry of the cholesteric phase. Physical Review X, Volume 4 (Number 3). Article number 031050 . doi:10.1103/PhysRevX.4.031050

2013

Chen, Bryan Gin-ge, Ackerman, Paul J., Alexander, Gareth P., Kamien, Randall and Smalyukh, Ivan I. (2013) Generating the Hopf fibration experimentally in nematic liquid crystals. Physical Review Letters, Volume 110 (Number 23). Article number 237801 . doi:10.1103/PhysRevLett.110.237801

2012

Alexander, Gareth P., Kamien, Randall and Mosna, Ricardo (2012) Conformal smectics and their many metrics. Physical Review E, Vol.85 (No.5). 05070 . doi:10.1103/PhysRevE.85.050701

Alexander, Gareth P., Chen, Bryan, Matsumoto, Elisabetta and Kamien, Randall (2012) Colloquium : disclination loops, point defects, and all that in nematic liquid crystals. Reviews of Modern Physics, Vol.84 (No.2). pp. 497-514. doi:10.1103/RevModPhys.84.497

Alexander, Gareth P., Kamien, Randall and Santangelo, Christian (2012) Developed smectics : when exact solutions agree. Physical Review Letters, Vol.108 (No.4). 047802. doi:10.1103/PhysRevLett.108.047802

2011

Ravnik, M., Alexander, Gareth P., Yeomans, J. M. and Zumer, S. (2011) Three-dimensional colloidal crystals in liquid crystalline blue phases. Proceedings of the National Academy of Sciences of the United States of America, Vol.108 (No.13). pp. 5188-5192. doi:10.1073/pnas.1015831108

2010

Alexander, Gareth P., Chen, Bryan, Matsumoto, Elisabetta and Kamien, Randall (2010) Power of the Poincaré group : elucidating the hidden symmetries in focal conic domains. Physical Review Letters, Vol.104 (No.25). Article no. 257802. doi:10.1103/PhysRevLett.104.257802

2008

Alexander, Gareth P., Pooley, C. and Yeomans, Julia M. (2008) Scattering of low-Reynolds-number swimmers. Physical Review E, Vol.78 (No.4). Article: 045302(R). doi:10.1103/PhysRevE.78.045302

Alexander, Gareth P. and Yeomans, Julia M. (2008) Dumb-bell swimmers. EPL (Europhysics Letters), Vol.83 (No.3). Article no. 34006. doi:10.1209/0295-5075/83/34006