Raunak Dey

Graduate Research Assistant

Education

BS-MS in Physical Sciences (2015-2020) from Indian Institute of Science Education and Research Kolkata (IISER K).

Honors & Awards

1. DST INSPIRE Scholarship (2015-2020) awarded by the Dept of Science and Technology, India.

2. MITACS Globalink Research Internship (2019), Canada.

3. SPIE Student author conference support by MKS Instuments (2021). 

Research

My research interest lies in the broad area of stochastic physics, non-Markov systems, complex networks, signal processing and optimization. Currently I work with Prof Joshua Weitz on parameter inference scheme in virus-microbe networks, using theoretical models as well as datasets from large scale ocean surveys. We use the tools such as but not limited to non-linear dynamics, convex-optimization as well as Bayesian learning to infer properties of large-scale biological networks, correlating both time series as well as 'ohmic' datasets. 

Although I have leaned more towards computational physics and Computer Science in recent times, I was a hard-core experimentalist by training. During and after my MS in India, I worked with Optical Tweezers as a tool to probe the interesting Physics behind stochastic phenomena at mesoscopic length-scales. I have published on diverse topics ranging from active broadband microrheology in polymers, to correlated motion in viscoelastic media, quantifying randomness in Markov and non-Markov processes and maximizing SNR in microrheology protocols, etc. Alongside, I worked on non-equilibrium statistical mechanics of entropy driven micro-engines of with optically trapped probes.

I am always looking to talk and collaborate with people from different spheres of academia and industry. The tools we use in our research extends to complex networks and stochastic problems in financial time series, socio-economic networks and should be relevant to the data science community at large. Please reach out to me for more information or discussing potential collaborations. I along with my collaborators am always looking for new and exciting problems to work on. 

Papers

1. Frontiers in Physics, January 2021, “Simultaneous random number generation and opticaltweezers calibration employing a learning algorithm based on the Brownian dynamics of a trappedcolloidal particle”, Raunak Dey, Subhrokoli Ghosh, Avijit Kundu and Ayan Banerjee.doi:10.3389/fphy.2020.576948  (https://www.frontiersin.org/articles/10.3389/fphy.2020.576948/full)

2. Soft Matter, June 2021, Active microrheology using pulsed optical tweezers to probe viscoelasticityof Lamin A towards diagnosis of laminopathies, Chandrayee Mukherjee, Avijit Kundu, Raunak Dey, Ayan Banerjee, Kaushik Sengupta. https://doi.org/10.1101/2021.02.05.429901

3. Physical Review Fluids, December 2021, "Single-shot wideband active microrheology using multiple-sinusoid modulated optical tweezers", Avijit Kundu, Raunak Dey, Shuvojit Paul, and Ayan Banerjee. https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.6.123301

Other Publications

1. SPIE Nanoscience + Engineering, August 2021, “Random number extraction from optically trapped Brownian oscillator in viscous and viscoelastic media using learning algorithms ”, Raunak Dey, Avijit Kundu, Subhrokoli Ghosh and Ayan Banerjee. https://spie.org/Publications/Proceedings/Paper/10.1117/12.2596502

2. SPIE Nanoscience + Engineering, “Microrheology over a broad frequency range probing multiple-sinusoid oscillating optical tweezer”, Avijit Kundu, Raunak Dey, Subhrokoli Ghosh and Ayan Banerjee. https://spie.org/Publications/Proceedings/Paper/10.1117/12.2596296

3. Bulletin of the American Physical Society “Probing medium viscoelasticity using signal transmission through coupled harmonic oscillators”, Avijit Kundu, Raunak Dey, Shuvojit Paul and Ayan Banerjee. https://meetings.aps.org/Meeting/MAR21/Session/S17.12

Memberships & Committees

1. SPIE student member 

Works in Progress

1. "Experimental verification of Arcsine laws in mesoscopic non-equilibrium and active systems”, Raunak Dey, Avijit Kundu, Biswajit Das and Ayan Banerjee.https://arxiv.org/abs/2104.00127v1

2. "Non-monotonic skewness of currents in non-equilibrium steady states"  https://arxiv:2201.06563