Dibyendu Das
Professor
Photograph: 
Phone: 
+91-22-25767555
Email: 
dibyendu@phy.iitb.ac.in
Office: 

303-B

 

Research Interests: 

Theory of Stochatic Processes,  and Non-equilibrium Statistical Physics and their applications to physical and biological systems. 

Among the physical systems, I am inetersted in polymer kinetics, pattern formation,  universal scaling properties of cooling granular matter, and active self-propelled particles and hard rods. Among biophysical systems, I am interested in kinetics of cytoskeletal filaments, pathogen populations, chromatin and gene expression.  

 

Ph.d. Students 


(Current):

  • Jyoti Sharma --Experiments on non-linear systems.
  • Animesh Biswas -- Experiments on non-linear and granular systems. 
  • Indrani Nayak -- Stoshastic processes in biology.   
  • Saeed Ahmed -- Stochastic processes. 
  • Krishna Rijal -- Stochastic processes.

(Past): 

  • Mahendra Shinde (defended, 2010) -- pattern formation in cooling granular gases.  
  • Supravat Dey (defended, 2012) -- pattern formation in active matter and dissipative gases.  [Post-doc -- University of Delaware, USA]
  • Dipjyoti Das (defended, 2014) -- stochastic processes in cytoskeletal filaments and microbial populations [Faculty -- IISER Kolkata]     
  • Aparna J.S. (defended, 2019) -- Studies of cytoskeletal filaments. [Post-doc -- Institut Curie, Paris, France]   

 

                                       FULL PUBLICATIONS

         

Selected Publications: 

                                           Stochastic processes and Biophysics

1. "Protein hourglass: Exact first passage time distributions for protein thresholds",
Krishna Rijal, Ashok Prasad, and Dibyendu Das,  
Phys. Rev. E 102, 052413 (2020).

2. "Comparison of mechanisms of kinetochore capture with varying number of spindle microtubules",
Indrani Nayak, Dibyendu Das, and Amitabha Nandi,
Phys. Rev. Research 2, 013114 (2020).

3. “First passage of a particle in a potential under stochastic resetting: A vanishing transition of optimal resetting rate”, 
Saeed Ahmad, Indrani Nayak, Ajay Bansal, Amitabha Nandi, and Dibyendu Das, 
Phys. Rev. E 99, 022130 (2019).

4. "Signatures of a macoscopic switching transition for a dynamic microtubule",
J. S. Aparna, Ranjith Padinhateeri, and Dibyendu Das,
Scientific Reports 7:  45747 (2017).

5. "Theoretical estimates of exposure timescales of protein binding sites on DNA regulated by nucleosome kinetics",
Jyotsana J. Parmar, Dibyendu Das, and Ranjith Padinhateeri, 
Nucleic Acids Research (online 2015) 44, 1630 (2016).  

6. “Collective force generated by multiple biofilaments can exceed the sum of forces due to individual ones'',
Dipjyoti Das, Dibyendu Das and Ranjith Padinhateeri,
New J. Phys. 16, 063032 (2014) .

                                   Active matter

6. “Spatial Structures and Giant Number Fluctuations in Models of Active Matter'',
Supravat Dey, Dibyendu Das and R. Rajesh,
Phys. Rev. Lett. 108, 238001 (2012).

                                  Polymer dynamics

7. “Kinetics of polymer tumbling in shear flow: a coarse-grained description”,
Sadhana Singh, R. K. Singh, Dibyendu Das, and Sanjay Kumar,  
Phys. Rev. E (Rapid. Com.) 99, 030501 (2019)

8. “Accurate statistics of a flexible polymer chain in shear flow'',
Dibyendu Das and Sanjib Sabhapandit,
Phys. Rev. Lett. 101, 188301 (2008).

                                  Granular gases

9. “Energy decay in Three-dimensional freely cooling granular gas'',
Sudhir N. Pathak, Zahera Jabeen, Dibyendu Das and R. Rajesh, 
Phys. Rev. Lett. 112 , 038001 (2014)

10. “Inhomogeneous Cooling of the Rough Granular Gas in Two Dimensions",
Sudhir N. Pathak, Dibyendu Das, R. Rajesh, 
Europhys. Lett. 107, 44001 (2014).

11. “Violation of Porod law in a freely cooling granular gas in one dimension'',
Mahendra Shinde, Dibyendu Das, and R. Rajesh, 
Phys. Rev. Lett. 99, 234505 (2007).

Research Category: