94 citations · 336 across the 23 of their papers we have counts for
23 papers
A perspective on active glassy dynamics in biological systems
Souvik Sadhukhan, Subhodeep Dey, Smarajit Karmakar +1
Dynamics is central to living systems. In the last two decades, experiments have revealed that the dynamics in diverse biological systems - from intracellular cytoplasm to cellular…
A shape-driven reentrant jamming transition in confluent monolayers of synthetic cell-mimics
Pragya Arora, Souvik Sadhukhan, Saroj Kumar Nandi +3
Many critical biological processes, like wound healing, require confluent cell monolayers/bulk tissues to transition from a jammed solid-like to a fluid-like state. Although numeri…
The structure-dynamics feedback mechanism governs the glassy dynamics in epithelial monolayers
Satyam Pandey, Soumitra Kolya, Padmashree Devendran +3
The glassy dynamics in confluent epithelial monolayers is crucial for several biological processes, such as wound healing, embryogenesis, cancer progression, etc. Several experimen…
Non-trivial activity dependence of static length scale and critical tests of active random first-order transition theory
Kallol Paul, Saroj Kumar Nandi, Smarajit Karmakar
Effects of activity on glassy dynamics are fundamental in several biological processes. Active glasses extend the scope of the equilibrium problem and provide new control parameter…
Dynamical heterogeneity in active glasses is inherently different from its equilibrium behavior
Kallol Paul, Anoop Mutneja, Saroj Kumar Nandi +1
Activity-driven glassy dynamics, while ubiquitous in collective cell migration, intracellular transport, dynamics in bacterial and ant colonies, etc., also extend the scope and ext…
The random first-order transition theory of active glass in the high-activity regime
Rituparno Mandal, Saroj Kumar Nandi, Chandan Dasgupta +2
Dense active matter, in the fluid or amorphous-solid form, has generated intense interest as a model for the dynamics inside living cells and multicellular systems. An extension of…
Theory and simulation for equilibrium glassy dynamics in cellular Potts model of confluent biological tissue
Souvik Sadhukhan, Saroj Kumar Nandi
Glassy dynamics in a confluent monolayer is indispensable in morphogenesis, wound healing, bronchial asthma, and many others; a detailed theoretical framework for such a system is,…
Size-Stretched Exponential Relaxation in a Model with Arrested States
Vaibhav Gupta, Saroj Kumar Nandi, Mustansir Barma
We study the effect of rapid quench to zero temperature in a model with competing interactions, evolving through conserved spin dynamics. In a certain regime of model parameters, w…
Affinity and valence impact the extent and symmetry of phase separation of multivalent proteins
Saroj Kumar Nandi, Daniel Österle, Meta Heidenreich +2
Biomolecular self-assembly spatially segregates proteins with a limited number of binding sites (valence) into condensates that coexist with a dilute phase. We develop a many-body…
Activity-dependent self-regulation of viscous length scales in biological systems
Saroj Kumar Nandi
Cellular cortex, which is a highly viscous thin cytoplasmic layer just below the cell membrane, controls the cell's mechanical properties, which can be characterized by a hydrodyna…
Effective temperature of active fluids and sheared granular matter
Saroj Kumar Nandi, Nir S. Gov
The dynamics within active fluids, driven by internal activity of the self-propelled particles, is a subject of intense study in non-equilibrium physics. These systems have been ex…
Nonequilibrium mode-coupling theory for dense active systems of self-propelled particles
Saroj Kumar Nandi, Nir S. Gov
The physics of active systems of self-propelled particles, in the regime of a dense liquid state, is an open puzzle of great current interest, both for statistical physics and beca…
Protein gradients in single cells induced by their coupling to "morphogen"-like diffusion
Saroj Kumar Nandi, Sam A. Safran
One of the many ways cells transmit information within their volume is through steady spatial gradients of different proteins. However, the mechanism through which proteins without…
Viscosity and effective temperature of an active dense system of self-propelled particles
Saroj Kumar Nandi
We obtain a nonequilibrium theory for a simple model of a generic class of active dense systems consisting of self-propelled particles with a self-propulsion force, , and pers…
Activity controls fragility: A Random First Order Transition Theory for an active glass
Saroj Kumar Nandi, Rituparno Mandal, Pranab Jyoti Bhuyan +3
How does nonequilibrium activity modify the approach to a glass? This is an important question, since many experiments reveal the near-glassy nature of the cell interior, remodelle…
Understanding the approximations of mode-coupling theory for sheared steady states of colloids
Saroj Kumar Nandi
The lack of clarity of various mode-coupling theory (MCT) approximations, even in equilibrium,makes it hard to understand the relation between various MCT approaches for sheared st…
Spinodals with Disorder: from Avalanches in Random Magnets to Glassy Dynamics
Saroj Kumar Nandi, Giulio Biroli, Gilles Tarjus
We revisit the phenomenon of spinodals in the presence of quenched disorder and develop a complete theory for it. We focus on the spinodal of an Ising model in a quenched random fi…
Critical dynamical heterogeneities close to continuous second-order glass transitions
Saroj Kumar Nandi, Giulio Biroli, Jean-Philippe Bouchaud +2
We analyse, using Inhomogenous Mode-Coupling Theory, the critical scaling behaviour of the dynamical susceptibility at a distance epsilon from continuous second-order glass transit…
The glass susceptibility: growth kinetics and saturation under shear
Saroj Kumar Nandi, Sriram Ramaswamy
We study the growth kinetics of glassy correlations in a structural glass by monitoring the evolution, within mode-coupling theory, of a suitably defined three-point function $χ_C(…
Yielding and large deviations in micellar gels: a model
Saroj Kumar Nandi, Bulbul Chakraborty, A. K. Sood +1
We present a simple model to account for the rheological behavior observed in recent experiments on micellar gels. The model combines attachment-detachment kinetics with stretching…
Mode-coupling theory for the dynamic heterogeneity in an aging glass: How Do Glassy Domains Grow?
Saroj Kumar Nandi, Sriram Ramaswamy
We construct the equations for the growth kinetics of an aging structural glass within mode-coupling theory through a non-stationary variant of the 3-density correlator defined in…
The mode-coupling glass transition in a fluid confined by a periodic potential
Saroj Kumar Nandi, Sarika Maitra Bhattacharyya, Sriram Ramaswamy
We show that a fluid under strong spatially periodic confinement displays a glass transition within mode-coupling theory (MCT) at a much lower density than the corresponding bulk s…
Comment on "Layering transition in confined molecular thin films: Nucleation and growth"
Saroj Kumar Nandi
When fluid is confined between two molecularly smooth surfaces to a few molecular diameters, it shows a large enhancement of its viscosity. From experiments it seems clear that the…