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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 50: Poster Session III
CPP 50.30: Poster
Dienstag, 17. März 2020, 14:00–16:00, P1C
Noise-induced symmetry breaking of self-regulators: An asymmetric phase transition towards homochirality — •Rafna Rafeek1 and Debasish Mondal2 — 1Department of Chemistry, Indian Institute of Science Education And Research Tirupati, Tirupati, India 517507 — 2Department of Chemistry, Indian Institute of Technology Tirupati, Tirupati, India 517506
Studies on the origin of spontaneous chiral symmetry breaking have become a 'Holy Grail' in recent research developments related to the origin of life. The paradigm of Frank (1953) and its subsequent variants indicate that a self-regulatory process may result in such single handedness in different reaction conditions. We consider a collection of Brownian particles, which can stay in any of the three possible isomeric states: one achiral and two enantiomers. Isomers are undergoing self-regulatory reaction along with chiral inhibition and achiral decay processes. The time evolution of the isomeric states is guided by those of its neighbors as well as the temperature of the system. We find that the relative dominance of self-regulation, chiral inhibition and achiral decay processes results in asymmetric transition between four different population phases, namely three-isomer coexistence, enantiomeric coexistence, chiral-achiral coexistence and homochiral phase. We also report that a fast stochastic self-regulation and an optimally slow chiral inhibition reaction along with a threshold population of interacting neighbors suffice the requisite for transition towards a completely symmetry broken state i.e., homochirality.