NISER

• PhD, Theoretical Physical Chemistry
  • Indian Association for the Cultivation of Science, India
  • Nov, 2014 - Dec, 2019
  • Thesis title: Beyond Born-Oppenheimer Theories On Molecular Processes
• M.Sc., Chemical Sciences
  • Indian Association for the Cultivation of Science, India
  • 2012 - 2014
• B.Sc., Chemistry Honors
  • St. Xavier’s College Kolkata, India
  • 2009 - 2012
     

• Understanding control of cold and ultracold molecular collisions in the presence of external fields 
• Prospects of ultracold molecule formation and non-reactive collisional studies between atoms and molecules under the influence of an external field
• Excited state potential energy surfaces and non-adiabatic quantum dynamics
• Atomic, molecular, and optical physics

• Recipient of Marie Skłodowska-Curie Actions Postdoctoral Fellowship in 2025.
• Awarded with DST-INSPIRE Faculty Fellowship, India in 2024.
• Awarded with National Postdoctoral Fellowship from SERB, India in 2024.
• Recipient of the Postdoctoral fellowship from the “Excellence Initiative - Research University” program from the Center of Atomic, Molecular, and Optical Physics of the University of Warsaw in 2024.
• Qualified joint CSIR-UGC National Eligibility Test (NET), India, in Chemical Sciences for Junior Research Fellowship (JRF) two times, held in June and December 2013.ˆ 
• Awarded with the certificate of merit for being among the top 0.1% of successful candidates of All India Senior Secondary Certificate Examination 2009 (XII standard examination).

1. Bijit Mukherjee and Michał Tomza, Optical excitation and stabilization of ultracold field-linked tetratomic molecules, arXiv (2025) (accepted in Physical Review Letters).
2. Bijit Mukherjee, Luis Santos, and Jeremy M. Hutson, Effective anisotropic interaction potentials for pairs of ultracold molecules shielded by a static electric field, New Journal of Physics 27, 093204 (2025).
3. Joy Dutta, Bijit Mukherjee, and Jeremy M. Hutson, Universality in the microwave shielding of ultracold polar molecules, Physical Review Research 7, 023164 (2025).
4. Bijit Mukherjee and Jeremy M. Hutson, SU(N) symmetry with ultracold alkali dimers: weak dependence of scattering properties on hyperfine state, Physical Review Research 7, 013099 (2025).
5. Bijit Mukherjee, Jeremy M. Hutson, and Kaden R. A. Hazzard, SU(N) magnetism with ultracold molecules, New Journal of Physics 27, 013013 (2025).
6. Bijit Mukherjee and Jeremy M. Hutson, Controlling collisional loss and scattering lengths of ultracold dipolar molecules with static electric fields, Physical Review Research 6, 013145 (2024).
7. Bijit Mukherjee, Matthew D. Frye, C. Ruth Le Sueur, Michael R. Tarbutt, and Jeremy M. Hutson, Shielding collisions of ultracold CaF molecules with static electric fields, Physical Review Research 5, 033097 (2023).
8. Bijit Mukherjee, Matthew D. Frye, and Jeremy M. Hutson, Magnetic Feshbach resonances between atoms in ²S and ³P₀ states: Mechanisms and dependence on atomic properties, Physical Review Research 5, 013102 (2023).
9. Bijit Mukherjee, Matthew D. Frye, and Jeremy M. Hutson, Feshbach resonances and molecule formation in ultracold mixtures of Rb and Yb(³P) atoms, Physical Review A 105, 023306 (2022). 
10. Satyam Ravi, Soumya Mukherjee, Bijit Mukherjee, Satrajit Adhikari, Narayanasami Sathyamurthy, and Michael Baer, Non-adiabatic coupling as a frictional force in (He, H, H)⁺ dynamics and the formation of HeH₂⁺, Molecular Physics 119, e1811907 (2021). 
11. Joy Dutta, Soumya Mukherjee, Koushik Naskar, Sandip Ghosh, Bijit Mukherjee, Satyam Ravi, and Satrajit Adhikari, The role of electron-nuclear coupling on multi-state photoelectron spectra, scattering processes and phase transitions, Physical Chemistry Chemical Physics 22, 27496 (2020).
12. Bijit Mukherjee, Koushik Naskar, Soumya Mukherjee, Satyam Ravi, K. R. Shamasundar, Debasis Mukhopadhyay, and Satrajit Adhikari, Beyond Born-Oppenheimer constructed diabatic potential energy surfaces for the F+H₂ reaction, The Journal of Chemical Physics 153, 174301 (2020). 
13. Satyam Ravi, Soumya Mukherjee, Bijit Mukherjee, Satrajit Adhikari, Narayanasami Sathyamurthy, and Michael Baer, Non-adiabatic coupling as a frictional force in the formation of H₃⁺: a model dynamical study, The European Physical Journal D 74, 1 (2020).
14. Koushik Naskar, Soumya Mukherjee, Bijit Mukherjee, Satyam Ravi, Saikat Mukherjee, Subhankar Sardar, and Satrajit Adhikari, ADT: A generalized algorithm and program for beyond Born-Oppenheimer equations of “N” dimensional sub-Hilbert space, Journal of Chemical Theory and Computation 16, 1666 (2020). 
15. A. K. Gupta, V. Dhindhwal, Michael Baer, Narayanasami Sathyamurthy, Satyam Ravi, Soumya Mukherjee, Bijit Mukherjee, and Satrajit Adhikari, Non-adiabatic coupling and conical intersection(s) between potential energy surfaces for HeH₂⁺, Molecular Physics 118, e1683243 (2020). 
16. Bijit Mukherjee, Koushik Naskar, Soumya Mukherjee, Sandip Ghosh, Tapas Sahoo, and Satrajit Adhikari, Beyond Born-Oppenheimer theory for spectroscopic and scattering processes, International Reviews in Physical Chemistry 38, 287 (2019).
17. Bijit Mukherjee, K. R. Shamasundar, Satrajit Adhikari, and Michael Baer, Topological studies related to molecular systems formed during the Big Bang: H₃⁺ as an example, International Journal of Quantum Chemistry 119, e25949 (2019).
18. Soumya Mukherjee, Bijit Mukherjee, Subhankar Sardar, and Satrajit Adhikari, Extended Born-Oppenheimer equations for non-Abelian situations: A study on NO₃ and 1,3,5-C₆H₃F₃⁺ radical cation, Computational and Theoretical Chemistry 1154, 57 (2019).
19. Soumya Mukherjee, Joy Dutta, Bijit Mukherjee, Subhankar Sardar, and Satrajit Adhikari, Conical intersections and nonadiabatic coupling terms in 1,3,5-C₆H₃F₃⁺: A six state beyond Born-Oppenheimer treatment, The Journal of Chemical Physics 150, 064308 (2019).
20. Bijit Mukherjee, Saikat Mukherjee, Subhankar Sardar, K. R. Shamasundar, and Satrajit Adhikari, A beyond Born-Oppenheimer treatment of five state molecular system NO₃ and the photodetachment spectra of its anion, Chemical Physics 515, 350 (2018).
21. Bijit Mukherjee, Sandip Ghosh and Satrajit Adhikari, Beyond Born-Oppenheimer treatment on spectroscopic and scattering processes, Journal of Physics: Conference Series 1148, 012001 (2018). 
22. Soumya Mukherjee, Bijit Mukherjee, Joy Dutta, Subhankar Sardar and Satrajit Adhikari, Topological effects in vibronically coupled degenerate electronic states: A case study on nitrate and benzene radical cation, ACS Omega 3, 12465 (2018). 
23. Bijit Mukherjee, Debasis Mukhopadhyay, Satrajit Adhikari and Michael Baer, Topological study of the H₃⁺⁺ molecular system: H₃⁺⁺ as a cornerstone for building molecules during the Big Bang, Molecular Physics 116, 2435 (2018). 
24. Bijit Mukherjee, Saikat Mukherjee, Subhankar Sardar, K. R. Shamasundar and Satrajit Adhikari, An ab initio investigation of non-adiabatic couplings and conical intersections among the lowest five electronic states of NO₃ radical, Molecular Physics 115, 2833 (2017). 
25. Bijit Mukherjee, Saikat Mukherjee, K. R. Shamasundar and Satrajit Adhikari, Beyond Born-Oppenheimer treatment for the construction of triple-sheeted accurate diabatic Hamiltonian matrix of F+H₂ system, Journal of Physics: Conference Series 833, 012004 (2017).
26. Sandip Ghosh, Saikat Mukherjee, Bijit Mukherjee, Souvik Mandal, Rahul Sharma, Pinaki Chaudhury and Satrajit Adhikari,
    Beyond Born-Oppenheimer theory for ab initio constructed diabatic potential energy surfaces of singlet H₃⁺ to study reaction dynamics using coupled 3D time-dependent wave-packet approach, The Journal of Chemical Physics 147, 074105 (2017). 
27. Soumya Mukherjee, Bijit Mukherjee and Satrajit Adhikari, Five electronic state beyond Born-Oppenheimer equations and their applications to nitrate and benzene radical cation, The Journal of Physical Chemistry A 121, 6314 (2017).
28. Bijit Mukherjee, Saikat Mukherjee and Satrajit Adhikari, Ab-initio non-adiabatic couplings among three lowest singlet states of H₃⁺: Construction of multisheeted diabatic potential energy surfaces, Journal of Physics: Conference Series 759, 012050 (2016).
29. Michael Baer, Bijit Mukherjee, Saikat Mukherjee and Satrajit Adhikari, Time-dependent molecular fields created by the interaction of an external electro-magnetic field with a molecular system: the derivation of the wave equations, Molecular Physics 114, 227 (2016). 
30. Saikat Mukherjee, Bijit Mukherjee, Subhankar Sardar and Satrajit Adhikari, Ab initio constructed diabatic surfaces of NO₂ and the photodetachment spectra of its anion, The Journal of Chemical Physics 143, 244307 (2015).
     

We are interested in the theoretical understanding of dynamics and spectroscopy of small molecules, especially under cold and ultracold temperatures. At low temperatures, many interesting phenomena occur that can only be explained by a fully quantum mechanical treatment. For example, resonances observed during collisions at low temperatures provide insights into the structure and dynamics of molecules relevant to cold and ultracold experiments. Particularly, Feshbach resonances not only facilitate the formation of molecules from pairs of colliding atoms but also provide a detailed understanding of collision complexes. We are also interested in collisions of polar ultracold molecules, where interesting physics happen. Their long-range dipolar interactions can be tuned with external electric fields, providing an unprecedented control over their collision rates. On the other hand, their short-range interactions can be determined using state-of-the-art electronic structure calculations, which will determine the fate of a collision process.

To be updated soon.

• C206 - Quantum Chemistry I 

To be updated.