49 citations · 236 across the 14 of their papers we have counts for
14 papers
Stochastic Operator Variance: an observable to diagnose noise and scrambling
Pablo Martinez-Azcona, Aritra Kundu, Adolfo del Campo +1
Noise is ubiquitous in nature, so it is essential to characterize its effects. Considering a fluctuating Hamiltonian, we introduce an observable, the stochastic operator variance (…
Integrable hydrodynamics of Toda chain: case of small systems
Aritra Kundu
Passing from a microscopic discrete lattice system with many degrees of freedom to a mesoscopic continuum system described by a few coarse-grained equations is challenging. The com…
RMS-Flux Relation and Disc-Jet Connection in Blazars in the Context of the Internal Shocks Model
Aritra Kundu, Ritaban Chatterjee, Kaustav Mitra +1
Recent analysis of blazar variability has revealed a proportionality between the mean flux and the root mean squared (rms) fluctuations about the mean flux. Although such rms-flux…
Dynamics of fluctuation correlation in periodically driven classical system
Aritra Kundu, Atanu Rajak, Tanay Nag
Having established the fact that interacting classical kicked rotor systems exhibit long-lived prethermal phase with quasi-conserved average Hamiltonian before entering into chaoti…
Revisiting the Mazur bound and the Suzuki equality
Abhishek Dhar, Aritra Kundu, Keiji Saito
Among the few known rigorous results for time-dependent equilibrium correlations, important for understanding transport properties, are the Mazur bound and the Suzuki equality. The…
Cosmic recombination history in light of EDGES measurements of the cosmic dawn 21-cm signal
Kanan K. Datta, Aritra Kundu, Ankit Paul +1
The recent EDGES measurements of the global 21-cm signal from the cosmic dawn suggest that the kinetic temperature of the inter-galactic medium (IGM) might be significantly lower c…
Anomalous heat transport in one dimensional systems: a description using non-local fractional-type diffusion equation
Abhishek Dhar, Anupam Kundu, Aritra Kundu
It has been observed in many numerical simulations, experiments and from various theoretical treatments that heat transport in one-dimensional systems of interacting particles cann…
Dynamical correlations of conserved quantities in the one-dimensional equal mass hard particle gas
Aritra Kundu, Abhishek Dhar, Sanjib Sabhapandit
We study a gas of point particles with hard-core repulsion in one dimension where the particles move freely in-between elastic collisions. We prepare the system with a uniform dens…
Transport properties of the classical Toda chain: effect of a pinning potential
Abhishek Dhar, Aritra Kundu, Joel L. Lebowitz +1
We consider energy transport in the classical Toda chain in the presence of an additional pinning potential. The pinning potential is expected to destroy the integrability of the s…
Fractional diffusion equation description of an open anomalous heat conduction set-up
Aritra Kundu, Cédric Bernardin, Keji Saito +2
We provide a stochastic fractional diffusion equation description of energy transport through a finite one-dimensional chain of harmonic oscillators with stochastic momentum exchan…
Anomalous heat equation in a system connected to thermal reservoirs
Priyanka, Aritra Kundu, Abhishek Dhar +1
We study anomalous transport in a one-dimensional system with two conserved quantities in presence of thermal baths. In this system we derive exact expressions of the temperature p…
Equilibrium dynamical correlations in the Toda chain and other integrable models
Aritra Kundu, Abhishek Dhar
We investigate the form of equilibrium spatio-temporal correlation functions of conserved quantities, and of energy transport in the Toda lattice and in other integrable models. Fr…
Distribution of quantum discord in Heisenberg Antiferromagnets
Aritra Kundu, V. Subrahmanyam
The quantum discord, which quantifies the amount of quantum correlations present between parts of a system, is investigated for antiferromagnetic spin systems. The discord for a pa…
Mass of highly magnetized white dwarfs exceeding the Chandrasekhar limit: An analytical view
Aritra Kundu, Banibrata Mukhopadhyay
In recent years a number of white dwarfs has been observed with very high surface magnetic fields. We can expect that the magnetic field in the core of these stars would be much hi…