Homepage of Dr. Ronald Benjamin
Dr. Ronald Benjamin
PhD Research Guide (2020 - Present)
Department of Physics,
CUSAT, Kochi - 682022, Kerala, India
UGCFRP Assistant Professor (2018-2023)
Department of Physics,
CUSAT, Kochi - 682022, Ernakulam, Kerala,, India
Guest Scientist,
Theoretical Physics II,
Institute of Soft Matter,
Heinrich-Heine University, Duesseldorf, Germany
Research
Soft Matter Theory and Simulation:
Phase Transitions, Nucleation, crystal growth, wetting and interfacial phenomena
Molecular Dynamics and Monte Carlo simulations
Thermodynamic Integration, Umbrella Sampling, Metadynamics, other free-energy based methods.
Simulation of colloids and Liquid Crystals
Computational Physics
Non-equilibrium Statistical Mechanics:
Stochastic Processes in Physical Systems: Thermodynamics and Transport of Brownian Motors, Stochastic Resonance, Noise Enhanced Stability, etc.
Fluctuation theorems
Theory and Simulations of Active Matter
Polymer Translocation
Academic Positions
2018-2023 UGCFRP Assistant Professor at Department of Physics, CUSAT, Kochi, Kerala
2017-2018 Senior Postdoctoral Fellow at TIFR, Hyderabad, India
2011-2016 Postdoctoral Fellow at the Institute of Soft Matter, Theoretical Physics II, Heinrich-Heine University, Duesseldorf, Germany
2009-2011 DAAD-DLR Postdoctoral Fellow at Institute of Materials Physics in Space, German Aerospace Center, Cologne, Germany
2009 Postdoctoral Fellow, University of Colorado at Boulder, USA
2005-2008 Graduate Research Fellow, University of Alabama (UAB), USA
2003-2005 Graduate Teaching Assistant, University of Oregon at Eugene, USA
Publications
1. Transport and current reversal in an Active Brownian ratchet driven by a time-dependent self-propulsion velocity, Springer Proceedings of MSMICFP Conference, 2023
2. Noise-induced transport in a periodic square-well potential, manuscript submitted 2023
3. Effective Diffusion and transport coherence in presence of inhomogeneous temperature: Piecewise linear potential - Ronald Benjamin, arXiv: 2211.04421 (2022).
4. Current and diffusion of overdamped active Brownian particles in a ratchet potential - Arjun SR and Ronald Benjamin, arXiv: 2211.04298 (2022).
5. Effect of roughness on the transport of an overdamped Brownian particle - Prathyusha S Nair and Ronald Benjamin, arXiv: 2211.03750
6. Free energy cost of forming an interface between a crystal and its frozen version - R. Benjamin and J. Horbach, Physical Review E, 92, 042408 (2015).
7. Crystal growth kinetics in Lennard-Jones and Weeks-Chandler-Andersen systems along the solid-liquid coexistence line- R. Benjamin and J. Horbach, J. Che, Phys., 143, 014702 (2015).
8. Crystal-liquid interfacial free energy of hard spheres via a thermodynamic integration scheme - R. Benjamin and J. Horbach, Physical Review E 91, 032410 (2015).
9. Excess free energy of supercooled liquids at disordered walls -R. Benjamin and J. Horbach, Phys. Rev E Rapid Communication 90, 060101(R) (2014).
10. Crystal-liquid interfacial free energy via Thermodynamic Integration - R. Benjamin and J. Horbach, J. Chem. Phys., 141, 044715 (2014).
11. Lennard-Jones systems near solid walls: Computing interfacial free energies from molecular simulation methods - R. Benjamin and J. Horbach, J. Chem. Phys., 139 , 084705 (2013).
12. Wall-liquid and wall-crystal interfacial free energies via thermodynamic integration: A molecular dynamics simulation study - Ronald Benjamin and J. Horbach, J. Chem. Phys., 137 044707 (2012).
13. Inertial effects in Buettiker-Landauer Motor and Refrigerator at the Overdamped Limit - R. Benjamin and R. Kawai, Phys. Rev. E, 77, 051132 (2008)
14. Stochastic energetics of a Brownian motor and refrigerator driven by non-uniform temperature - R. Benjamin, Int. J. Mod. Phys. B, 28, 140055 (2014).
15. Nucleation barriers for the liquid-to-crystal transition in simple metals: Experiment vs. simulation - J. Bokeloh, G Wilde, RE Rozas, R Benjamin, J Horbach, The European Physical Journal Special Topics 223 (3), 511-526 (2014).
16. On and off membrane dynamics of the endoplasmic reticulum–Golgi tethering factor p115 in vivo-E - Brandon, T Szul, C Alvarez, R Grabski, R Benjamin, R Kawai, E Sztul, Molecular biology of the cell 17 (7), 2996-3008 (2006).
Manuscripts in Preparation
Efficiency and coherent transport in Brownian Motors
Thermophysical properties of the Theta-Phase of the compound Al2Cu.
Select Invited and Contributed Talks
Crystal-liquid interfacial free energy via Thermodynamic Integration-Soft Matter Conference, Cambridge, UK
Molecular simulation methods to compute interfacial free energies - DPG, 2014, Dresden
Wall-liquid and wall-crystal interfacial free enrgies via Molecular Dynamics Simulation- SPP Meeting, Frankfurt, 2013
Excess free energy of supercooled liquids near disordered walls- DPG 2013, Regensburg
Interfacial free energies via non-equilibrium work and Gibbs-Cahn Integration- CompPhys12, Leipzig, 2012
Interfacial free energies of Lennard-Jones particles near solid walls- CECAM Conference in Villars, Switzerland, 2013
Efficiency optimization of a Brownian Motor driven by non-uniform temperature-DPG 2012, Berlin.
Molecular Dynamics Simulation of a Buettiker-Landauer Motor and Refrigerator-APS March 2008 Meeting in New Orleans, Louisiana, USA.
Honours and Awards
American Physical Society (APS) Travel Award for making oral presentation at APS meetings
Outstanding Graduate Student Award - UAB Physics Department
GATE Physics Exam (A GRE-Physics type exam to select students in India for PhD and Master's positions at the prestigious IIT's) - All India Rank 10 (99.46 percentile)
Awarded PhD Fellowships at TIFR, Mumbai, India; University of Southern California, USA; Montana State University, Bozeman, USA; Ohio University, Athens, USA; Wesleyan University, Connecticut, USA at several times
JEST Physics ( A GRE-Physics type exam to select students in India for PhD positions at Select Research Institutes of India) - 1st Rank in Entire State (97.5 percentile)
CSIR-UGC JRF & L (A GRE General-cum GRE Physics type exam to select students for PhD and teaching positions at various Indian Institutions) - Qualified 3 times
Awarded Postdoctoral Fellowships at IISC, Bangalore, India; IMSC, Chennai, India; SNBNCBS Calcutta, India; Helsinki University of Technology, Finland, India; Nanyang Technological University, Singapore
Awarded Graduate Student Scholarship by University of Alabama at Birmingham, USA
Selected for UGCFRP Assistant Professorship by UGC, India
Selected as Assistant Professor (Senior, Level 12) at VIT (Vellore Institute of Technology) in 2017