Séminaire Katarina KARLOVA
du 24 juin 2022 au 25 juin 2022
Publié le 16 juin 2022– Mis à jour le 16 juin 2022
Séminaire de Ananyo MAITRA
Time liquid crystals: A story of activity, chirality and non-reciprocity.
Vendredi 24 juin, 14h00, JOUR EXCEPTIONNEL (en distanciel sur Microsoft Teams) (Team CY Warwick Theoretical Physics )
Time liquid crystals: A story of activity, chirality and non-reciprocity.
Ananyo MAITRA
(LPTM CY Cergy Paris Université)
Active matter theories generally augment descriptions of passive liquid crystals with nonequilibrium forces and currents, thereby addressing how activity affects these structures. In this talk, I will first introduce active matter and then ask a less common question: can activity create new liquid crystals -- spatiotemporal structures impossible in passive systems? I will demonstrate that the interplay of chiral asymmetry and activity yields liquid crystalline phases that break time-translation symmetry, which cannot be broken in equilibrium and present two examples: a time-cholesteric phase and a time-crystalline phase with hexatic spatial order. I will further argue that time liquid crystalline phases exist even in systems whose microscopic constituents are structurally achiral due to non-reciprocal interactions.
Pour s'inscrire à la session Teams, merci d'envoyer un mail à Jean AVAN.