Condensed Matter Theory: publications

Quantum Entanglement Growth Under Random Unitary Dynamics

(2016)

Authors:

Adam Nahum, Jonathan Ruhman, Sagar Vijay, Jeongwan Haah

Thermalization and light cones in a model with weak integrability breaking

(2016)

Authors:

Bruno Bertini, Fabian HL Essler, Stefan Groha, Neil J Robinson

Non-Fermi glasses: fractionalizing electrons at finite energy density

(2016)

Authors:

SA Parameswaran, Sarang Gopalakrishnan

Strong zero modes and eigenstate phase transitions in the XYZ/interacting Majorana chain

Journal of Physics A: Mathematical and Theoretical 49:30 (2016) 30LT01-30LT01

Defect-mediated morphologies in growing cell colonies

Physical Review Letters American Physical Society 117:4 (2016) 048102

Authors:

Amin Doostmohammadi, Sumesh P Thampi, Julia Yeomans

Abstract:

Morphological trends in growing colonies of living cells are at the core of physiological and evolutionary processes. Using active gel equations, which include cell division, we show that shape changes during the growth can be regulated by the dynamics of topological defects in the orientation of cells. The friction between the dividing cells and underlying substrate drives anisotropic colony shapes toward more isotropic morphologies, by mediating the number density and velocity of topological defects. We show that the defects interact with the interface at a specific interaction range, set by the vorticity length scale of flows within the colony, and that the cells predominantly reorient parallel to the interface due to division-induced active stresses.

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