38 citations · 134 across the 10 of their papers we have counts for
10 papers
Navigation driven by bidirectional information transmission between sensing and actuation
Avishek Das, Pieter Rein ten Wolde
A wide variety of biological functions are driven by feedback between sensing and actuation. A paradigmatic example is cellular navigation. During navigation, the sensory system ma…
Variational path sampling of rare dynamical events
Aditya N. Singh, Avishek Das, David T. Limmer
This article reviews the concepts and methods of variational path sampling. These methods allow computational studies of rare events in systems driven arbitrarily far from equilibr…
Enhancing nanoscale charged colloid crystallization near a metastable liquid binodal
Christian P. N. Tanner, Vivian R. K. Wall, Joshua Portner +17
Bottom-up assembly of nanocrystals (NCs) into ordered arrays, or superlattices (SLs), is a promising route to design materials with new functionalities, but the degree of control o…
In situ coherent X-ray scattering reveals polycrystalline structure and discrete annealing events in strongly-coupled nanocrystal superlattices
Matthew J. Hurley, Christian P. N. Tanner, Joshua Portner +13
Solution-phase bottom up self-assembly of nanocrystals into superstructures such as ordered superlattices is an attractive strategy to generate functional materials of increasing c…
In situ X-ray scattering reveals coarsening rates of superlattices self-assembled from electrostatically stabilized metal nanocrystals depend non-monotonically on driving force
Christian P. N. Tanner, James K. Utterback, Joshua Portner +7
Self-assembly of colloidal nanocrystals (NCs) into superlattices (SLs) is an appealing strategy to design hierarchically organized materials with new functionalities. Mechanistic s…
Nonequilibrium design strategies for functional colloidal assemblies
Avishek Das, David T. Limmer
We use a nonequilibrium variational principle to optimize the steady-state, shear-induced interconversion of self-assembled nanoclusters of DNA-coated colloids. Employing this prin…
Direct evaluation of rare events in active matter from variational path sampling
Avishek Das, Benjamin Kuznets-Speck, David T. Limmer
Active matter represents a broad class of systems that evolve far from equilibrium due to the local injection of energy. Like their passive analogues, transformations between disti…
Reinforcement learning of rare diffusive dynamics
Avishek Das, Dominic C. Rose, Juan P. Garrahan +1
We present a method to probe rare molecular dynamics trajectories directly using reinforcement learning. We consider trajectories that are conditioned to transition between regions…
Variational design principles for nonequilibrium colloidal assembly
Avishek Das, David T. Limmer
Using large deviation theory and principles of stochastic optimal control, we show that rare molecular dynamics trajectories conditioned on assembling a specific target structure e…
Variational control forces for enhanced sampling of nonequilibrium molecular dynamics simulations
Avishek Das, David T. Limmer
We introduce a variational algorithm to estimate the likelihood of a rare event within a nonequilibrium molecular dynamics simulation through the evaluation of an optimal control f…