Reentrant rigidity transition in planar epithelia with volume and area elasticitySarkar, Tanmoy (Avtor) Krajnc, Matej (Avtor) biophysicsepithelial mechanicsrigidity transitionphase diagramWe find a reentrant columnar-to-squamous rigidity transition in three-dimensional (3D) epithelia, governed by volume and area elasticity. Our model maps to the classic 2D area- and perimeter-elasticity model but, unlike its 2D counterpart, shows compression-induced softening or stiffening, depending on the initial state. The phase diagram reveals floppy states with vanishing shear and in-plane bulk moduli, alongside a lateral-tension-driven discontinuous columnar-to-squamous transition. The critical behavior underlying the emergence of the reentrant transition belongs to the mean-field universality class.American Physical Society20262026-02-24 13:07:40Neznano27765ZDAsl