Theory Group Lunchtime Seminars
Scheduled seminars are listed below.
Announcements and reminders will be posted to the physics-theory-group-seminar list.
To join this list:
- Sign into your university email account via webmail.
- Click the settings icon along the top icon bar (looks like a cog/gear).
- In the "Search Outlook settings" box type "distribution groups" and click the top search result.
- Under "Distribution groups I belong to" click the icon with two little people and a "+" sign.
- Search for physics-theory-group-seminar and double click on the result.
- Click "join". You will then be added to the email list once approved by a moderator.
To leave this list:
- Sign into your university email account via webmail.
- Click the settings icon along the top icon bar (looks like a cog/gear).
- In the "Search Outlook settings" box type "distribution groups" and click the top search result.
- Under "Distribution groups I belong to" click
physics-theory-group-seminar. - Click the "leave" icon above the list (looks like two people with a minus sign to their bottom right).
[If you are a member of Theory group, you will receive seminar announcements via physics-theory or physics-theory-staff. You do NOT need to subscribe to the above mailing list as well.]
Theory Seminar: Miha Ravnik (Ljubljana), Structures of Passive and Active Nematic Defects
Complex –passive or active- nematic fluids are characterised by internal orientational order, which upon tuning or frustration, can exhibit topological defects. The type of defects and their role naturally depend on dimensionality of the system, but importantly also on the geometry, confinement, flow, driving or even activity. Here, we present structures of topological defects in passive and active nematic complex fluids – forming umbilic defects, singular loops, point defects and disclinations. Specifically, we show in passive nematics how confinement in the form of complex geometry and fractal surfaces can lead to formation of various defect-based nematic profiles, including exhibiting high-elastic multipoles. In active nematics, we show defect profiles in three-dimensional active nematic droplet, also highlighting the role of different surface coupling regimes.