99 citations · 449 across the 20 of their papers we have counts for
20 papers
Heat capacity as a marker for shape and jamming transitions in active systems
Ion Santra
Persistence influences the stationary states of active particles, producing boundary accumulation at the single-particle level, and clustering or jamming in interacting systems. Th…
Universal winding laws in chiral active motion
Ion Santra, Urna Basu, Debraj Dutta +1
Chiral active particles, from bacteria and sperm cells to engineered microswimmers, undergo persistent motion that breaks both time-reversal and mirror symmetries. This broken mirr…
Brownian motion with stochastic energy renewals
Ion Santra, Kristian Stølevik Olsen
We investigate the impact of intermittent energy injections on a Brownian particle, modeled as stochastic renewals of its kinetic energy to a fixed value. Between renewals, the par…
Dynamics of switching processes: general results and applications to intermittent active motion
Ion Santra, Kristian Stølevik Olsen, Deepak Gupta
Systems switching between different dynamical phases is an ubiquitous phenomenon. The general understanding of such a process is limited. To this end, we present a general expressi…
Harmonic chain driven by active Rubin bath: transport properties and steady-state correlations
Ritwick Sarkar, Ion Santra, Urna Basu
Characterizing the properties of an extended system driven by active reservoirs is a question of increasing importance. Here we address this question in two steps. We start by inve…
Target search by active particles
Urna Basu, Sanjib Sabhapandit, Ion Santra
Active particles, which are self-propelled nonequilibrium systems, are modelled by overdamped Langevin equations with colored noise, emulating the self-propulsion. In this chapter,…
Dichotomous acceleration process in one dimension: Position fluctuations
Ion Santra, Durgesh Ajgaonkar, Urna Basu
We study the motion of a one-dimensional particle which reverses its direction of acceleration stochastically. We focus on two contrasting scenarios, where the waiting-times betwee…
Long time behavior of run-and-tumble particles in two dimensions
Ion Santra, Urna Basu, Sanjib Sabhapandit
We study the long-time asymptotic behavior of the position distribution of a run-and-tumble particle (RTP) in two dimensions and show that the distribution at a time can be exp…
Stationary states of activity-driven harmonic chains
Ritwick Sarkar, Ion Santra, Urna Basu
We study the stationary state of a chain of harmonic oscillators driven by two active reservoirs at the two ends. These reservoirs exert correlated stochastic forces on the boundar…
Dynamical fluctuations of a tracer coupled to active and passive particles
Ion Santra
We study the induced dynamics of an inertial tracer particle elastically coupled to passive or active Brownian particles. We integrate out the environment degrees of freedom to obt…
Effect of stochastic resetting on Brownian motion with stochastic diffusion coefficient
Ion Santra, Urna Basu, Sanjib Sabhapandit
We study the dynamics of a Brownian motion with a diffusion coefficient which evolves stochastically. We first study this process in arbitrary dimensions and find the scaling form…
Effect of tax dynamics on linearly growing processes under stochastic resetting: a possible economic model
Ion Santra
We study a system of agents, whose wealth grows linearly, under the effect of stochastic resetting and interacting via a tax-like dynamics -- all agents donate a part of their…
Universal framework for the long-time position distribution of free active particles
Ion Santra, Urna Basu, Sanjib Sabhapandit
Active particles self-propel themselves with a stochastically evolving velocity, generating a persistent motion leading to a non-diffusive behavior of the position distribution. Ne…
Activity driven transport in harmonic chains
Ion Santra, Urna Basu
How the transport properties of an extended system is affected by coupling to active reservoirs is a significant, yet virtually unexplored question. Here we address this issue in t…
Direction reversing active Brownian particle in a harmonic potential
Ion Santra, Urna Basu, Sanjib Sabhapandit
We study the two-dimensional motion of an active Brownian particle of speed , with intermittent directional reversals in the presence of a harmonic trap of strength . The p…
Brownian motion under intermittent harmonic potentials
Ion Santra, Santanu Das, Sujit Kumar Nath
We study the effects of an intermittent harmonic potential of strength -- that switches on and off stochastically at a constant rate , on an overdamped Brownian parti…
Active Brownian Motion with Directional Reversals
Ion Santra, Urna Basu, Sanjib Sabhapandit
Active Brownian motion with intermittent direction reversals are common in a class of bacteria like {\it Myxococcus xanthus} and {\it Pseudomonas putida}. We show that, for such a…
Run-and-Tumble particles in Two-dimensions under Stochastic Resetting
Ion Santra, Urna Basu, Sanjib Sabhapandit
We study the effect of stochastic resetting on a run and tumble particle (RTP) in two spatial dimensions. We consider a resetting protocol which affects both the position and orien…
Quantum Brownian Motion: Drude and Ohmic Baths as Continuum Limits of the Rubin Model
Avijit Das, Abhishek Dhar, Ion Santra +2
The motion of a free quantum particle in a thermal environment is usually described by the quantum Langevin equation, where the effect of the bath is encoded through a dissipative…
Run-and-tumble particles in two-dimensions : Marginal position distributions
Ion Santra, Urna Basu, Sanjib Sabhapandit
We study a set of Run-and-tumble particle (RTP) dynamics in two spatial dimensions. In the first case of the orientation θ of the particle can assume a set of n possible discrete v…