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Startseite > Seminars > Séminaires théorie > Theory Club Tuesday October 23 2018 at 1pm in room 646A. Ananyo Maitra: "Can orientational order be sustained in highly active systems?".

Theory Club Tuesday October 23 2018 at 1pm in room 646A. Ananyo Maitra: "Can orientational order be sustained in highly active systems?"

Unless otherwise stated, seminars and defences take place at 11:30 in room 454A of Condorcet building.

Can orientational order be sustained in highly active systems?

Ananyo Maitra

Abstract: It is generally believed that orientationally ordered phases of active particles in fluids are generically destabilised by activity. However, I will demonstrate that activity can at times stabilise ordered phases. I first reexamine the standard theory of apolar suspensions on substrates and uncover a hitherto overlooked active force with a distinct spatial symmetry. This active force, which I show is more relevant compared to the usual one at large scales, can lead to an ordered state which becomes more stable with increasing activity. I then examine a novel active phase of synchronously rotating chiral active particles and demonstrate that in this case, the spontaneous rotation can stabilise the ordered phase even in momentum conserved systems. These results can explain the unusual stability of ordered phases in certain bacterial and motor-microtubule systems.

Tuesday October 23 at 1pm in room 646A

Contact : Équipe séminaires / Seminar team - Published on / Publié le 11 October 2018

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