Phone:+91 361 258 2708 (Off.),
+91 361 258 4708 (Res.)

Email: santra [at]

Fax:+91 361 269 0762

Sitangshu Bikas Santra
Department of Physics
Indian Institute of Technology Guwahati
Guwahati - 781 039, Assam, India

PhD at Bose Institute, Kolkata.
Post docs at ESPCI, Paris; Ecole Polytechnique, France and Texas A & M University at Galveston, USA.
Research area:
Phase transitions and Critical phenomena in equilibrium and out of equilibrium situations, Soft-condensed Matter and Computational Statistical Physics.
Problems looking at present:
  • Study of Active Matter under different external conditions (Open).
  • Hydrodynamics of Active fluids (with Prof. P. K. Mishra, IITG) (Open).
  • Study of aerosols by Statistical mecnanical models and data analysis (with Prof. D. Pal,IITG) (Open).
  • Fiber bundle with fractal support: A new perspective (With Dr.Santanu Sinha, NTNU) (Open)
  • Random spring Network: Britle to ductile transition(with Prof. P. Ray, IMSc) (Open).
  • Modeling of Mitocondria and study of its Enzyme kinetics (with Prof. R. Swaminathan, IITG)(Open).
  • Corossion of random solids:Inverse fiber bundle and percolation (Open).
  • Percolation of interacting particles: A new paradigm (Open).
  • Statistical Mechanice of Active Ising: Spin-spin Interaction, self propulsion and flipping (Open).
  • Cancer as a dynamical phase transition: Non-equilibrium Statistical Mechanics (Open).
  • Variational transfer matrix and disordered Ising magnet (with Prof. D. J. Klein, UT,Galveston) (Open).
  • Ising magnet and negative magnetization (with Prof. D. Pal,IITG).
  • Two phase flow in porous media: Percolation and conductivity (with Prof. Alex Hansen, NTNU/IITG).
  • Open projects are availbale for new Ph.D. students

    Problems looked at:
  • Random walk
  • Self-avoiding walks
  • Polymer configurations
  • Percolation under external fields
  • Gelation
  • Diffusion in random media & pores
  • Etching and dissolution of random solid
  • Self-organized criticality: sandpile
  • Self-organized criticality on Networks
  • Biological modeling
  • Enzyme kinetics
  • Explosive percolation
  • Disordered Kinetic Ising Model
  • Active matters
  • Selected Publications:
  • Pattern formation and phase transition in the collective dynamics of a binary mixture of polar self-propelled particles: Sagarika Adhikari and S B Santra, PHYSICAL REVIEW E 105, 064612 (2022)
  • Effect of trapping perturbation on the collective dynamics of self-propelled particles: Sagarika Adhikari and S B Santra, EPL 135, 48003, (2021).
  • Kinetic Ising model under sinusoidal oscillating external magnetic field: hysteresis and dynamic phase transition: Sourav Chattopadhyay and S. B. Santra, Eur. Phys. J. B (2021) 94:72
  • Consequences of Heterogeneous Crowding on an Enzymatic Reaction: A Residence Time Monte Carlo Approach, Rajat Anand, Manish Agrawal, Venkata Satish Kumar Mattaparthi, Rajaram Swaminathan and Sitangshu Bikas Santra, ACS Omega, 4, 727, (2019).
  • Controlling self-organized criticality of a preferential sandpile model on scale-free networks, Himangsu Bhaumik and S. B. Santra, Europhysics Lett. 124, 46002 (2018).
  • Random growth lattice filling model of percolation: a crossover from continuous to discontinuous transition, Bappaditya Roy and S. B. Santra, J. Stat. Mech. 053206 (2018).
  • Stochastic sandpile model on small-world networks: scaling and crossover, Himangsu Bhaumik and S. B. Santra, Physica A: 511, 358 (2018).
  • Finite size scaling study of a two parameter percolation model: constant and correlated, Bappaditya Roy and S. B. Santra, Physica A: 492, 969 (2018).
  • First order transition in a percolation model with nucleation and preferential growth, Bappaditya Roy and S. B. Santra, Phys. Rev. E 95, 010101(R) (2017).
  • Dissipative stochastic sandpile model on small-world networks: Properties of nondissipative and dissipative avalanches, Himangsu Bhaumik and S. B. Santra, Phys Rev E. 94, 062138 (2016).
  • Crossover from rotational to stochastic sandpile universality in the random rotational sandpile model, Himangsu Bhaumik, J. A. Ahmed and S. B. Santra, Phys Rev E. 90, 062136 (2014).
  • Critical properties of sandpile on small world network, Himangsu Bhaumik and S. B. Santra, Phys Rev E. 88, 062817 (2013).
  • Modeling the Biomass Growth and Enzyme Secretion by the White Rot Fungus Phanerochaete chrysosporium in Presence of a Toxic Pollutant, Kausik Sen, Kannan Pakshirajan, Sitangshu Bikas Santra, Journal of Environmental Protection, 3, 114 (2012)
  • Critical properties of island perimeters in the flooding transition of stochastic and rotational sandpile models, J. A. Ahmed and S. B. Santra, Physica A: 391, 5332 (2012)
  • Flooding transition in the topography of toppling surfaces of stochastic and rotational sandpile models, J. A. Ahmed and S. B. Santra, Phys. Rev. E 85, 031111 (2012).
  • Sandpile avalanche properties in terms of a microscopic parameters, J. A. Ahmed and S. B. Santra, Europhys Lett. 90, 50006 (2010).
  • Invasion of a sticky random solid: self-established potential gradient, phase separation and criticality, S. B. Santra, S. Sinha and J. A. Ahmed, Phys. Rev. E78, 061135 (2008)
  • Characteristics of deterministic and stochastic sandpile models in a rotational sandpile model, S. B. Santra, S. Ranjita Chanu and D. Deb, Phys. Rev. E75, 041122 (2007).
  • Self-organized dynamical equilibrium in the corrosion of random solids, S. Sinha, V. Kishore and S. B. Santra, Europhys. Lett. 71, 632 (2005).
  • Breakdown of Universality in Directed Spiral Percolation, S. Sinha and S. B. Santra, Eur. Phys. J. B. 39, 513 (2004).
  • Directed Self-avoiding Walks in Random Media, S. B. Santra, W. A. Seitz, and D. J. Klein, Phys. Rev. E. 63, 67101 (2001).
  • Fractal Interfaces in the Self-Stabilized Etching of Random Systems, B. Sapoval, S. B. Santra and Ph. Borboux, Europhys. Lett. 41, 297, (1998).
  • Fluid Induced Particle size Segregation in Sheared Granular Assemblies, S. B. Santra, S. Schawarzer, and H. J. Herrmann, Phy. Rev. E 54, 5066, (1996).
  • Weak pinning of interfaces, S. B. Santra, A. Peterson, and S. Roux, Phys. Rev. E 53, 3867, (1996).
  • Percolation under rotational constraint: a finite-size scaling study, S. B. Santra and I. Bose, J. Phys. A: Math. Gen.24, 2367, (1991).
  • Research Funding:
  • Board of Research in Nuclear Sciences, Department of Atomic Energy, Government of India.
  • Department of Science and Technology, Government of India.
  • Research Guidance:
  • Percolation under Crossed bias fields: Criticality and scaling, Santanu Sinha
  • Sandpile model under rotational constraint : Scaling, universality and crossover, Jahir Abbas Ahmed
  • Textilye dyeing wastewater treatment potential of Phanerochaete chrysosporium: Experiment and simulation, Kausik Sen
  • Discontinuous percolation transition: Search for new models and scaling theory, Bappaditya Roy
  • Self-organized criticality on complex networks: Sandpile model, scaling and universality, Himangshu Bhoumik
  • Disordered magnetic materials: Kinetic Ising Model and finite size scaling, Sourav Chattopadhyay
  • Collective dynamics of active particles in heterogeneous media and trapping, Sagarika Adhikary
  • Two phase flow in porous media: A new percolation phenoemenon (Jnana Ranjan Das) (On going)
  • Ising magnet and a perspective of negative magnetization (Kousik Sutradhar) (On going with Prof. D. Pal)
  • Events Organized:
  • Conference on Computational Physics: CCP2015, 2-5 December, 2015
  • Conference on Statistical Physics Approaches on Multi-disciplinary Problems, 7-13 January, 2008.
  • SERC School on Computational Statistical Physics, 1-21 December, 2008.
  • Discussion meeting on Statistical and Condensed Matter Physics, 31st Oct.-1st.Nov, 2009.
  • Innovation in Science Pursuit for Inspired Research, 15-21 December, 2009
  • Editing:
  • Computational Statistical Physics, Edited by S. B. Santra and P. Ray, Hindustan Book Agency, New Delhi, 2011.
  • PRAMANA-Journal of Physics, Issue Editors S. B. Santra and S. S. Manna, Vol.71, No.2, 2008.
  • Undergraduate teaching:
  • Physics - I : PH 101
  • Physics Laboratory
  • Elements of Statistical Physics
  • Quantum Physics
  • Solid State Physics
  • Simulation techniques for Physical systems
  • Postgraduate teaching:
  • Classical Mechanics
  • Statistical Mechanics
  • Numerical Methods and Computational Physics
  • Phase transitions and Critical Phenomena
  • Monte Carlo Simulation Methods and Applications
  • Solid State Physics
  • Advanced Mathematical Physics
  • Advanced Statistical Physics
  • Numerical Methods and Programming
  • Quantum and Statistical Mechanics