Mini-workshop on non-equilibrium systems 2017

Place : Seminar room 1-2, Research Institute for Electronic Science, Hokkaido University 

Date : 13 September, 2017

Organised by Laboratory of Mathematical and Physical Ethology



10:00-11:00  Helmut Brand (Dept. of Physics, Universität Bayreuth, Bayreuth, Germany)*


Macroscopic properties of ferromagnetic nematics


Abstract: 

Already more than 4 decades ago the possibility of ferromagnetic nematic liquid crystals has been postulated [1] by combining

ferromagnetic nanoparticles with a nematic solvent. First experiments along these ideas were carried out immediately [2],
giving rise to ferronematics with no spontaneous magnetization. Only a few years ago [3], with the development of suitably
well-characterized magnetic nanoparticles, truly ferromagnetic nematics could be synthesized and analyzed thus establishing
the first multiferroic liquid system. The static properties including magneto-optic and converse magneto electric effects were 

demonstrated [4]. Quite recently the study of the dynamics of truly ferromagnetic nematic liquid crystals properties has
started [5]. It was demonstrated in [5] that a dissipative cross-coupling between the two order parameters [6], magnetization and
director, is essential to account for the dynamic experimental results quantitatively. Recent developments [7] in the dynamic domain
include investigations of the light scattering behavior as well as the coupling to flow including shear flows and the analog of the
Miesowicz viscosities familiar from usual nematic liquid crystals.
References: 

[1] F. Brochard and P.G. de Gennes, J. Phys. 31, 691 (1970). 

[2] J. Rault, P.E. Cladis, and J.-P. Burger, Phys. Lett. A 32, 199 (1970).
[3] A. Mertelj, D. Lisjak, M. Drofenik, and M. Copic, Nature 504, 237 (2013). 

[4] A. Mertelj, N. Osterman, D. Lisjak, and M. Copic, Soft Matter 10, 9065 (2014).
[5] T. Potisk et al., Phys. Rev. Lett. 119, (2017). 

[6] E. Jarkova, H. Pleiner, H.-W. Mueller and H.R. Brand, J. Chem. Phys. 118, 2422 (2003).
[7] T. Potisk et al., to be published


11:00-12:00 Takafumi Kita (Dept. of Physics, Hokkaido University)*

3/2-body correlations and coherence in Bose-Einstein condensates


Lunch break


13:30-14:10 Wataru Kohno (Dept. of Physics, Hokkaido University)*

Ground state of M-component Bose-Einstein condensates with 3/2-body interactions


14:10-14:30 Hikaru Ueki (Dept. of Physics, Hokkaido University)*

Microscopic calculation of the flux-flow Hall effect in an s-wave superconductor 
with an isolated vortex


Tea break


14:40-15:20 Yuzuru Sato (RIES, Hokkaido University)*

Anomalous diffusion in random dynamical systems


15:20-16:00 Daniel Schenz (RIES, Hokkaido University)

Optimisation of Expanding Biological Transportation Networks: Exploratory Migration in Physarum polycephalum


16:00-16:40 Katsuhiko Sato (RIES, Hokkaido University)

Shear banding in actin solutions


18:30- Workshop dinner (Sushi Hanamaru)