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Debarshee Bagchi on Muck Rack

Debarshee Bagchi

As seen in: PNAS, Physical Review B
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Articles

Unusual ergodic and chaotic properties of trapped hard rods

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By Debarshee Bagchi, Jitendra Kethepalli, Vir B. Bulchandani, Abhishek Dhar
| Physical Review B
We investigate ergodicity, chaos, and thermalization for a one-dimensional classical gas of hard rods confined to an external quadratic or quartic trap, which breaks microscopic integrability. To quantify the strength of chaos in this system, we compute its maximal Lyapunov exponent numerically. The approach to thermal equilibrium is studied by considering the time evolution of particle position and velocity distributions and comparing the late-time profiles with the Gibbs state.
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Finite-temperature equilibrium density profiles of integrable systems in confining potentials

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By Debarshee Bagchi, Abhishek Dhar, Anupam Kundu, Jitendra Kethepalli
| Physical Review B
Abstract We study the equilibrium density profile of particles in two one-dimensional classical integrable models, namely hard rods and the hyperbolic Calogero model, placed in confining potentials. For both of these models the interparticle repulsion is strong enough to prevent particle trajectories from intersecting. We use field theoretic techniques to compute the density profile and their scaling with system size and temperature, and we compare them with results from Monte Carlo simulations.
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Surface polarization effects in confined polyelectrolyte solutions

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By Trung Nguyen, Debarshee Bagchi
| PNAS Verified
Models to predict six life outcomes based on data collected over 15 years suggest that the use of predictive models in criminal and social systems may need to be reevaluated, along with the assumption that life trajectories can be predicted.
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