51 citations · 686 across the 50 of their papers we have counts for
52 papers
Traveling waves, phase separation and pattern formation in the active stepping stone model
Rashmiranjan Bhutia, Prasad Perlekar, Kabir Ramola
Selective advantage leads to the proliferation of a species into an ecosystem. On the other hand, self-propulsion can lead to dynamic clustering of individuals. To analyze the intr…
Continuously varying exponents in the distribution of waiting times in the symmetric exclusion process on a percolation cluster
Arpan Chatterjee, Kabir Ramola, Deepak Dhar
We study the waiting-time distribution of hard-core interacting particles in the symmetric exclusion process on one- and two-dimensional lattices with side branches attached to eac…
Critical behavior and crossover scaling in the Light-Heavy model
Shilpa Prakash, Mustansir Barma, Kabir Ramola
The Light-Heavy (LH) model involves two species of particles (light and heavy) coupled with a fluctuating surface (described by tilts). The dynamics include the inherent diffusion…
Fermions on a 1D lattice: localized sources and sinks with dephasing
Elka Bhattacharya, Sushant Saryal, Soumya Ghosh +1
We study a general one-dimensional spinless fermionic system subject to a localized source, sink, and bulk dephasing. Within the Lindblad framework, we compute the time evolution o…
Energy-Weighted Site Percolation in Two Dimensions
Sayan Sircar, Kabir Ramola
We study a generalization of two-dimensional site percolation by assigning an energy cost to bonds between nearest-neighbor occupied sites. This leads to a competitio…
A constitutive model for discontinuous shear thickening in epithelial tissues
Tanmoy Ghosh, Kabir Ramola, Saroj Kumar Nandi
The rheological properties of biological tissues, though fundamental to many physiological and pathological processes such as embryonic development, wound healing, and tumor progre…
Stress Response of Jammed Solids: Prestress and Screening
Surajit Chakraborty, Jishnu N. Nampoothiri, Subhro Bhattacharjee +2
Unlike classical elasticity, where stresses arise from deformations relative to a stress-free reference configuration, rigidity in amorphous systems is maintained by disordered for…
Diffusive noise controls early stages of genetic demixing
Rashmiranjan Bhutia, Stephy Jose, Prasad Perlekar +1
Theoretical descriptions of the stepping-stone model, a cornerstone of spatial population genetics, have long overlooked diffusive noise arising from migration dynamics. We derive…
Exact Fluctuating Hydrodynamics of the Scaled Light-Heavy Model
Shilpa Prakash, Mustansir Barma, Kabir Ramola
We study the exact fluctuating hydrodynamics of the scaled Light-Heavy model (sLH), in which two species of particles (light and heavy) interact with a fluctuating surface. This mo…
Instabilities govern the low-frequency vibrational spectrum of amorphous solids
Surajit Chakraborty, Roshan Maharana, Smarajit Karmakar +1
Amorphous solids exhibit an excess of low-frequency vibrational modes beyond the Debye prediction, contributing to their anomalous mechanical and thermal properties. Although a $ω^…
Long-Range Correlations in Elastic Moduli and Local Stresses at the Unjamming Transition
Surajit Chakraborty, Kabir Ramola
We explore the behavior of spatially heterogeneous elastic moduli as well as the correlations between local moduli in model solids with short-range repulsive potentials. We show th…
Current fluctuations in finite-sized one-dimensional non-interacting passive and active systems
Arup Biswas, Stephy Jose, Arnab Pal +1
We investigate the problem of effusion of particles initially confined in a finite one-dimensional box of size . We study both passive as well active scenarios, involving non-in…
Universal stress correlations in crystalline and amorphous packings
Roshan Maharana, Debankur Das, Pinaki Chaudhuri +1
We present a universal characterization of stress correlations in athermal systems, across crystalline to amorphous packings. Via numerical analysis of static configurations of par…
Stress correlations in near-crystalline packings
Roshan Maharana, Kabir Ramola
We derive exact results for stress correlations in near-crystalline systems in two and three dimensions. We study energy minimized configurations of particles interacting through H…
Effect of initial conditions on current fluctuations in non-interacting active particles
Stephy Jose, Alberto Rosso, Kabir Ramola
We investigate the effect of initial conditions on the fluctuations of the integrated density current across the origin () up to a given time in a one-dimensional system o…
Generalized disorder averages and current fluctuations in run and tumble particles
Stephy Jose, Alberto Rosso, Kabir Ramola
We present exact results for the fluctuations in the number of particles crossing the origin up to time in a collection of non-interacting run and tumble particles in one dimen…
Enhanced Vibrational Stability in Glass Droplets
Surajit Chakraborty, Vishnu V. Krishnan, Kabir Ramola +1
We show through simulations of amorphous solids prepared in open boundary conditions that they possess significantly fewer low-frequency vibrational modes compared to their periodi…
Current fluctuations in an interacting active lattice gas
Stephy Jose, Rahul Dandekar, Kabir Ramola
We study the fluctuations of the integrated density current across the origin up to time in a lattice model of active particles with hard-core interactions. This model is amena…
Green's Functions For Random Resistor Networks
Sayak Bhattacharjee, Kabir Ramola
We analyze random resistor networks through a study of lattice Green's functions in arbitrary dimensions. We develop a systematic disorder perturbation expansion to describe the we…
Tensor Electromagnetism and Emergent Elasticity in Jammed Solids
Jishnu N. Nampoothiri, Michael D'Eon, Kabir Ramola +2
The theory of mechanical response and stress transmission in disordered, jammed solids poses several open questions of how non-periodic networks -- apparently indistinguishable fro…
First contact breaking distributions in strained disordered crystals
Roshan Maharana, Jishnu N. Nampoothiri, Kabir Ramola
We derive exact probability distributions for the strain () at which the first stress drop event occurs in uniformly strained disordered crystals, with quenched disorder introdu…
Active Random Walks in One and Two Dimensions
Stephy Jose, Dipanjan Mandal, Mustansir Barma +1
We investigate active lattice walks: biased continuous time random walks which perform orientational diffusion between lattice directions in one and two spatial dimensions. We stud…
Annealing effects of multidirectional oscillatory shear in model glass formers
Vishnu V. Krishnan, Kabir Ramola, Smarajit Karmakar
We study the effects of cyclic, athermal quasi-static shear on a model glass-forming system in three dimensions. We utilize the three available orthogonal shear planes, namely $XY,…
Emergent power-law interactions in disordered crystals
Pappu Acharya, Debankur Das, Surajit Sengupta +1
We derive exact results for the fluctuations in energy produced by microscopic disorder in near-crystalline athermal systems. Our formalism captures the heterogeneity in the elasti…