Physics of Complex Systems

• Faculty Member, S. N. Bose National Centre for Basic Sciences, Kolkata (2011 - present)
• Postdoctoral Research Associate, University of Stuttgart, Germany (2009 - 2011)
• Postdoctoral Research Fellow, Technion,  Israel (2006 - 2009)

• Ph.D.: Tata Institute of Fundamental research, India (2006)
• M.Sc.: University of Calcutta (2000)
• B.Sc.: Presidency College (1998)

I have been working in the broad area of nonequilibrium statistical physics,

including problems relevant to biology. The central theme of my current research involves the problem of characterizing systems driven far from equilibrium, through studies of the topics including (but, not limited to):

(i) Large-scale (hydrodynamic) characterization of non-equilibrium

mass transport processes (mass chipping and aggregation models, self-

propelled particles, and sandpiles, etc.),

(ii) Fluctuation relations in and large-deviation properties of the above

mentioned driven systems,

(iii) Steady-state thermodynamics of driven systems in terms of intensive

thermodynamic variables like equilibrium chemical potential,

(iv) Single-file transport through confined geometry in the presence of an

external driving (both time-independent and time-dependent).

I have also worked on large-deviation properties of height fluctuations and distribution of residence time of sand grains in the models of self-organized criticality (sandpile and ricepile models), first passage time distributions of random walker inside a domain with absorbing boundaries, etc.

•   [Google Scholar]    [Research Gate]

• Hyperuniformity in mass transport processes with center-of-mass conservation: Some exact results, Animesh Hazra, Anirban Mukherjee, and Punyabrata Pradhan, J. Stat. Mech. (2025) 023201; https://doi.org/10.1088/1742-5468/ada88c . https://arxiv.org/abs/2410.00613 .

• Anomalous current fluctuations and mobility-driven clustering, Tanmoy Chakraborty, and Punyabrata Pradhan, J. Stat. Mech. (2025) 093203; https://iopscience.iop.org/article/10.1088/1742-5468/adfa77/pdf. https://arxiv.org/abs/2410.00613 .

• Time-dependent properties of run-and-tumble particles. II. Current fluctuations, Tanmoy Chakraborty and Punyabrata Pradhan, Phys. Rev. E 109, 044135 (2024). https://doi.org/10.1103/PhysRevE.109.044135; https://arxiv.org/abs/2309.02896 .

• Anomalous relaxation and hyperuniform fluctuations in center-of-mass conserving systems with broken time-reversal symmetry, Anirban Mukherjee, Dhiraj Tapader, Animesh Hazra and Punyabrata Pradhan, Phys. Rev. E 110, 024119 (2024). https://doi.org/10.1103/PhysRevE.110.024119 ; https://arxiv.org/abs/2312.11181 .

• Dynamic correlations in the conserved Manna sandpile, Anirban Mukherjee and Punyabrata Pradhan, Phys. Rev. E 107, 024109 (2023).

• Anomalous collective diffusion of interacting run-and-tumble particles, Tanmoy Chakraborty and Punyabrata Pradhan, arXiv: 2209.11995.

• Density relaxation in conserved Manna sandpiles, Dhiraj Tapader, Punyabrata Pradhan, and Deepak Dhar, Phys. Rev. E 103, 032122 (2021).

• Hydrodynamics, superfluidity, and giant number fluctuations in a model of self-propelled particles, Tanmoy Chakraborty, Subhadip Chakraborti, Arghya Das, and Punyabrata Pradhan, Phys. Rev. E 101, 052611 (2020).

• Hydrodynamics, density fluctuations and universality in conserved stochastic sandpiles, Sayani Chatterjee, Arghya Das, and Punyabrata Pradhan, Phys. Rev. E 97, 062142(2018).

• Einstein relation and hydrodynamics of nonequilibrium mass transport processes, Arghya Das, Anupam Kundu, Punyabrata Pradhan, Phys. Rev. E 95, 062128 (2017).

• Spatial correlations, additivity and fluctuations in conserved-mass transport processes, Arghya Das, Sayani Chatterjee, Punyabrata Pradhan, Phys. Rev. E 93, 062135 (2016).

• Additivity, density fluctuations, and nonequilibrium thermodynamics for active Brownian particles, Subhadip Chakraborti, Shradha Mishra, Punyabrata Pradhan, Phys. Rev. E 93, 052606 (2016).

• Zeroth law and nonequilibrium thermodynamics for steady states in contact, Sayani Chatterjee, Punyabrata Pradhan, and P. K. Mohanty, Phys. Rev. E 91, 062136 (2015).

• Gammalike mass distributions and mass fluctuations in conserved-mass transport processes, Sayani Chatterjee, Punyabrata Pradhan, and P. K. Mohanty, Phys. Rev. Lett. 112, 030601 (2014) .

• Interacting particles in a periodically moving potential: Traveling wave and transport, Rakesh Chatterjee, Sakuntala Chatterjee, Punyabrata Pradhan, and S. S. Manna, Phys. Rev. E 89, 022138 (2014).

• Nonequilibrium fluctuation theorems in the presence of a time-reversal symmetry-breaking field and nonconservative force, Punyabrata Pradhan, Phys. Rev. E 81, 021122 (2010).