Faculty at School of Natural Sciences

Subhra Sen Gupta

Subhra Sen Gupta

Assistant Professor

School of Natural Sciences


Contact Information

The research in our group can be broadly classified as Theoretical Condensed Matter Physics. More specifically, our research focuses on the field of  Strongly Correlated Electron Systems (Ground State as well as Spectroscopic properties), where electron-electron interactions cannot be treated as a perturbation to its motion in the crystal potential, resulting in the breakdown of conventional band-structure description for such systems, at least in the rigourous sense.

On one hand, this field helps us to better understand emergent phenomena that can arise out of strong, non-perturbative interactions between electrons in narrow-band solids, like compounds of transition metals, rare-earths and actinides. The hallmark of this is seen in exotic phenomena like colossal magnetoresistance in the Manganites, high-temperature superconductivity in the Cuprates, spin-charge separation and charge fractionalization in low-dimensional correlated systems, and the Kondo effect, to name a few. In such phenomena one simply cannot think of each electron independently, but must take into account the collective behaviour of a macroscopically large number (~ Avogadro's Number) of electrons, all acting in unison. On the other hand, a basic understanding of the physics of these materials helps in designing “smart materials” with advanced and energy-efficient functionalities.

Since treating the full correlation problem for an infinite solid is an unsolvable problem, the challenge for theory is to continuously develop newer and more efficient analytical approximations and numerical techniques to better understand the properties of these “quantum materials”, as constantly emerging from experiments. We have been working in this field for more than a decade, trying to model the ground state (low-energy) as well as the spectroscopic (high-energy) properties of correlated electron systems, in collaboration with leading experts in the field, both in India and abroad. We are interested both in model problems as well as in complex real materials. Our research interests and efforts have been traditionally directed towards the following broad areas :

  • Electronic, Magnetic and Spectral properties of Strongly Correlated Electron Systems : Including mixed-valent systems, systems with strong spin-orbit coupling (e.g., 4d and 5d transition metal oxides), systems exhibiting exotic spin-orbital and hidden order.
  • Modeling of high-energy X-ray spectroscopies : e.g. XAS, AES, XPS, NIXS, RIXS etc. in strongly correlated systems.
  • Spin/orbital magnetism and magneto-crystalline anisotropy in nano-structured materials : e.g., surfaces/thin-films/multilayers/nano-particles etc.
  • Development of new computational tools for correlated electron systems.

More recently, we have developed an interest in some newer research areas and are already pursuing active research in some of them (highlighted in blue). These are listed below :

  • Calculation of High-energy Optical Conductivity in Strongly Correlated Electron Systems (related to my successfully completed DST Project ECR/2016/002054).
  • Application of Random Matrix Theory (RMT) to Disordered Quantum Electronic and Spin Systems.
  • Integrability, Ergodicity and Quantum Chaos in Quantum Lattice Models.
  • Multifractality and Many-body Localization in Disordered Interacting Systems.
  • Investigation of Astrophysical Magnetism in Compact Astrophysical Objects based on Methods of Quantum Statistics.
  • Topological Aspects in Condensed Matter Physics.

TEACHING :

I love teaching and am open to teaching almost any Core course and designing new Electives. Since January 2015, I have taught the following courses at SNU

  • PHY102 : Introduction to Physics II, Laboratory (Under-graduate CORE). [Spring 2015]
  • PHY203 : Introduction to Mathematical Physics - I (Under-graduate CORE). [Monsoon 2017 - 2018]
  • PHY301 : Classical Mechanics (Under-graduate CORE). [Monsoon 2021 - 2024]
  • PHY302 : Statistical Physics (Under-graduate CORE). [Spring 2024, 2025]
  • PHY304 : Condensed Matter Physics (Under-graduate CORE). [Spring 2015 - 2016 & Spring 2021]
  • PHY305 : Quantum Mechanics - I (Under-graduate CORE). [Monsoon 2015 - 2020, Monsoon 2025]
  • PHY306 : Quantum Mechanics - II (Under-graduate CORE). [Spring 2016 - 2022]
  • PHY417 : Topics in Quantum Many Body Theory (Under-graduate Advanced ELECTIVE, Suitable for Post-Graduates too). [Spring 2017 - 2018, Monsoon 2019 - 2021]
  • PHY508 : Review of Quantum Mechanics (Post-graduate CORE). [Monsoon 2015]
  • PHY507 : Review of Statistical Mechanics (Post-graduate CORE). [Monsoon 2023 - 2025]
  • CCC422 : Demystifying the Strange Quantum World for the Layman (Under-graduate CCC) [Spring 2020, Monsoon 2021, Spring 2022]
  • PHY101 :  Introduction  to  Physics  -  I,  Lectures  (Under-graduate  CORE  for Engineering). [Monsoon 2022]
  • PHY102 :  Introduction  to  Physics  -  II,  Lectures  (Under-graduate  CORE  for Engineering). [Spring 2023]
  • PHY499 : Undergraduate Thesis (4th Year) (Under-graduate CORE, Thesis Supervisor, Examiner, Thesis Evaluator etc.) [2015 - Present]
  • PHY599 : Research Methodology (Post-graduate CORE, Co-Instructor) [2015 - Present]

POSTDOCTORAL FELLOWS

  1. Postdoc Name : Dr. Deepak Singh Kathyat
    Broad Project Title : “Understanding the Behaviour of Complex (Quantum) Systems using Techniques of Statistical Physics”
    Status : Ongoing (Started in April 2025).

DOCTORAL RESEARCH STUDENTS :

  1. Student Name : Debojyoti Kundu
    Thesis Title : “Theoretical Investigations of Spectral Properties of Ordered and Disordered Strongly Correlated Electronic and Spin Systems”Status : Completed (Graduated in April 2024) [Currently a Post-doctoral Fellow at ICTS-TIFR, Bangalore.]
     
  2. Student Name : Harsh Kumar
    Thesis Title : Statistical Physics of Complex Quantum Systems [Broad Tentative Title]
    Status : Ongoing (From Monsoon 2024)

UNDERGRADUATE RESEARCH STUDENTS :

  1. Student Name : Siddharth Seetharaman [2017-18]
    Thesis Title : “Canonical Transformations of Generalized Hubbard Models”
    Status (Grade Obtained) : Completed in 2018 (Grade Obtained : A)
    Current Position : Pursuing Ph.D. at IISER-Pune, after a Masters Degree at the Ohio State University, USA.
     
  2. Student Name : Girish Kumar [2017-18]
    Thesis Title : “Strong Self-consistent Magnetic Fields in Magnetic White Dwarfs”
    Status (Grade Obtained) : Completed in 2018 (Grade Obtained : A-)
    Current Position : Pursuing a Second Masters Degree in “History and Philosophy of Science” at Utrecht University, after a Masters Degree at the University of Amsterdam.
     
  3. Student Name : Prakriti Kayastha [2017-18]
    Thesis Title : “Developing the Kernel Polynomial Method to Calculate Spectral and Correlation Functions”
    Status (Grade Obtained) : Completed in 2018 (Grade Obtained : A-)
    Current Position : Pursuing Ph.D. at Northumbria University, UK, after a Masters Degree from TIFR Hyderabad.
     
  4. Student Name : Vikas Bhat [2018-19]
    Thesis Title : “Exact Calculation of Non-resonant Inelastic X-ray Scattering (NIXS) from Correlated Systems with Nearly Empty Bands”
    Status (Grade Obtained) : Completed in 2019 (Grade Obtained : A-)
    Current Position : Pursuing Integrated Ph.D. in Physics at TIFR, Mumbai.
     
  5. Student Name : Ninaad Adhvaryu [2018-19]
    Thesis Title : “Developing Calculations for X-ray Absorption Spectra (XAS) in the Diffraction Limit”
    Status (Grade Obtained) : Completed in 2019 (Grade Obtained : A-)
    Current Position : Teaching at Ahmedabad University (Finished Masters in Physics at the University of Stuttgart, Germany).
     
  6. Student Name : Kartikeya Rambhatla (Jointly with the University of Sapienza, Italy) [2019-20]
    Thesis Title : “Adaptive Single Photon Phase Estimation using Genetic Algorithm”
    Status (Grade Obtained) : Completed in 2020 (Grade Obtained : A-)
    Current Position : Working for a Startup Company (Finished Masters in Quantum Technology at the University of Glasgow, UK).
     
  7. Student Name : Jasmehar Chawla [2023-24]
    Thesis Title : “In Search of Quantum Chaos via Out-of-Time-Order Correlators (OTOCs) in Complex Quantum Systems.”
    Status (Grade Obtained) : Completed in Spring 2024 (Grade Obtained : A)
    Current Position : Pursuing a Masters Degree in Theoretical Physics at Uppsala University, Sweden.
     
  8. Student Name : Amrita Ahuja [2023-24]
    Thesis Title : “Eigenstate Localization and Multifractality in Power-Law Random Banded Matrices (PRBM).”
    Status (Grade Obtained) : Completed in Spring 2024 (Grade Obtained : A)
    Current Position : Joining soon (September 2025) the Masters Program in Quantum Technologies and Engineering, under the Prestigious    Erasmus  Mundus Masters Program, with Full Fellowship.
     
  9. Student Name : Sakash Gupta [2024-25] 
    Thesis Title     : “Understanding Multifractality in some Special Random Matrix Ensembles via Analysis of Singularity Spectra.”
    Status (Grade Obtained) : Completed in Spring 2025 (Grade Obtained : B)
    Current Position : Offered Admissions into Physics Masters Programs from Pondicherry University and Delhi Technological University (DTU).
     
  10. Student Name : Madhesh Krishna Saravanan [2024-25] (Jointly with IISER, Pune)
    Thesis Title : “Spectral Statistics Using Power-Law Banded Random Matrices and Applications.”
    Status (Grade Obtained) : Completed in Spring 2025 (Grade Obtained : B)
    Current Position : Offered Admission into the Physics Masters Program from TU Dresden.

  • 2007 Doctor of Philosophy (Ph.D.) [Specialization : Theoretical Condensed Matter Physics], Indian Institute of Science (IISc), Bangalore, India (Integrated Ph.D. Program).
  • 2000 M.S. (Physical Sciences), Indian Institute of Science (IISc), Bangalore, India (Integrated Ph.D. Program).
  • 1997 B.Sc. (Physics Hons.), St. Xavier’s College, Kolkata, India (University of Calcutta).

  • 12/14 – Present -Assistant Professor, Department of Physics, School of Natural Sciences, Shiv Nadar University and then auto-transferred to the Shiv Nadar IoE, Delhi-NCR.
  • 01/13 - 12/14 - RIKEN FPR (Foreign Postdoctoral Researcher) Fellow, RIKEN (Computational Condensed Matter Physics Laboratory, ASI/CEMS), Wako, Japan.
  • 03/12 - 12/12 - Visiting Research Associate, Department of Condensed Matter Physics and Material Science, S.N. Bose National Centre for Basic Sciences, Kolkata, India.
  • 03/08 - 02/12 - Post-doctoral Research (and Teaching) Fellow, Department of Physics & Astronomy, University of British Columbia (UBC), Vancouver, BC, Canada.
  • 01/07 - 02/08- Postdoctoral Fellow, Department of Material Science, S. N. Bose National Centre for Basic Sciences, Kolkata, India.

VISITING POSITIONS

  • June - July 2025 : Visiting Faculty, Department of Physics, Indian Institute of Science Education and Research (IISER) - Kolkata, Kalyani, India. [Host : Prof. Rangeet Bhattacharyya].
  • June 2025 : Visiting Faculty, Department of Condensed Matter and Materials Physics, S.N. Bose National Centre for Basic Sciences (SNBNCBS), Salt Lake, Kolkata, [Host : Prof. Priya Mahadevan].
  • June 2019 : Visiting Faculty, Astrophysics Group, Nordic Institute for Theoretical Physics (NORDITA), Stockholm, Sweden [Host : Prof. Dhrubaditya Mitra].

  • 2025 The following article from our Group was Selected as the Editor's Pick “Beyond nearest- neighbor universality of spectral fluctuations in quantum chaotic and complex many-body systems”, Debojyoti Kundu, Santosh Kumar and Subhra Sen Gupta*, Chaos 35, 043122 (2025). [https:// org/10.1063/5.0234333]
  • 2024 Invited Speaker at the International Conference : “Asia-Pacific Conference on Condensed Matter Physics - 2024 (AC2MP 2024)” held at Indian Institute of Technology (IIT) - Patna, India. (December, 2024).
  • 2024 Invited Speaker at the National Conference : “7th Annual Conference on Quantum Condensed Matter (QMAT 2024)” held at Indian Institute of Technology (IIT) - Guwahati, India.. (December, 2024).
  • 2024 Invited Speaker at the National Conference : “dd-Transitions 2024 : A Discussion Meeting on the Electronic Structure of Materials” Bhor, Maharashtra. (July, 2024).
  • 2024 Invited Speaker at the National Conference : “9th Indian Statistical Physics Community Meeting (ISPCM-2023)” held at TIFR-ICTS, Bangalore (April, 2024).
  • 2024 Invited Speaker at the National Conference : “6th Annual Conference on Quantum Condensed Matter (QMAT 2023)” held at NISER, Bhubaneshwar (November, 2023).
  • 2023 Chosen by SN IoE to be the Convenor and Moderator for the Panel Discussion : “The Indo-French Cooperation Perspectives in Quantum Technology”, featuring the famous French Nobel Laureate, Prof. Serge Haroche, and three other National Experts on the subject, during Prof. Haroche’s visit to SN IoE (Held on 13 February, 2023).
  • 2023  Invited Speaker at the National Conference : “8th Indian Statistical Physics Community Meeting (ISPCM-2023)” held at TIFR-ICTS, Bangalore (February, 2023).
  • 2022  Invited Speaker and Session Chair at the International Conference “6th Young Investigators Meet on Quantum Condensed Matter Theory (YIMQCMT-2022)" organized by NISER, Bhubaneshwar, during October-November, 2022.
  • 2022  Invited Speaker and Co-organizer of the the National Conference : “d-d Transitions : A Discussion Meeting on the Electronic Structure of Materials” held at Colva, Goa (August, 2022).
  • 2021 Invited Speaker at the International Conference “5th Young Investigators Meet on Quantum Condensed Matter Theory (YIMQCMT-2021)" organized by NISER, Bhubaneshwar, during November, 2021.
  • 2021 Invited Speaker at the International Conference “Interdisciplinary Topics in Advanced Materials (ITAM-2021)” organized jointly by IISc and JNCASR, Bangalore during July, 2021
  • 2019NORDITA Academic Visitor in the Astrophysics Group of Nordic Institute for Theoretical Physics (NORDITA), Stockholm, Sweden (June, 2019).
  • 2016  Early Career Research Award, SERB (DST), India.
  • 2012Selected for the prestigious RIKEN Foreign Postdoctoral Researcher (FPR) Fellowship, RIKEN, Japan (about 20 candidates selected Internationally every year, including the fields of Physics, Chemistry, Biology, Medicine and Engineering)
  • 2007 Spontaneously offered a Post-doctoral Position in the renowned Sawatzky Group, at the University of British Columbia, Vancouver, Canada, after receiving a exceptionally good Ph.D. Thesis Report from Prof. G. A. Sawatzky, a father figure in the field.
  • 1997  Selected for the Integrated Ph.D. Fellowship/Program of the Indian Institute of Science, Bangalore, India. Followed by the IISc JRF and SRF Fellowships in 1999 and 2002.
  • 1997   National Merit Scholar (1997) (Govt. of India) on the basis of B.Sc. (Hons.) results.
  • 1994   National Merit Scholar (1994) (Govt. of India) on the basis of XII std. results (ranked 40th in the State of West Bengal).

  • Received Rs. 30,000 as the OUR Grant as a part of of Approved OUR Project “Using Quantum Mechanics to understand Quantum Information and Quantum Entropies.” (2022-23).
  • Early Career Research Award (ECRA) Grant of SERB (DST) [3-year budget of ~ 21 Lakhs], India, ECR/2016/002054, (2018-2021). [Status : Closed Successfully in December 2022]
  • Research Grant of ¥ 1,000,000 per year (for 3 years) as a part of the RIKEN FPR Fellow Position at the RIKEN Wako Institute, Japan (2013-2016). 

  • “Beyond nearest-neighbor universality of spectral fluctuations in quantum chaotic and complex many-body systems”, Debojyoti Kundu, Santosh Kumar and Subhra Sen Gupta*, Chaos 35, 043122 (2025). [https://doi.org/10.1063/5.0234333]
    [Article Selected as Editor's Pick]
    [Also published on the arXiv in August 2024 as: arXiv:2408.04345, https://doi.org/10.48550/ arXiv.2408.04345].
  • “Signatures of Spectral Crossovers in the Short- and Long-range Spectral Correlations of a Disordered Spin-chain with Kramers Degeneracy", Debojyoti Kundu, Santosh Kumar* and Subhra Sen Gupta*, Phys. Rev. B 107, 094205 (2023). [Also published on the arXiv in September 2023 as: arXiv:2309.13918, https://doi.org/10.48550/arXiv.2309.13918.]
  • “Spectral crossovers and universality in quantum spin chains coupled to random fields”: Debojyoti Kundu, Santosh Kumar*, Subhra Sen Gupta*, Rev. B 105, 014205 (2022). [Also published on the arXiv in September 2023 as: arXiv:2309.14076, https://doi.org/10.48550/ arXiv.2309.14076.]
  • RMT Spectral Distribution Crossovers in Random Spin Chains, Debojyoti Kundu, Santosh Kumar, Subhra Sen Gupta, Bulletin of the American Physical Society (2021).
  • Coexistence of Bound and Virtual-bound States in Shallow-core to Valence X-ray Spectroscopies : Subhra Sen Gupta*, J. A. Bradley, M. W. Haverkort, G. T. Seidler, A. Tanaka, and G. A. Sawatzky, Phys. Rev. B 84, 075134 (2011).
  • The Importance of Inter-site Coherences in the X-ray Absorption Spectra of Mixed-valent Systems : Subhra Sen Gupta*, Hiroki Wadati and G. A. Sawatzky, Europhysics Letters 93, 47008 (2011).
  • Probing electronic correlations in actinide materials using multipolar transitions : J. A. Bradley, Subhra Sen Gupta, G. T. Seidler, K. T. Moore, M. W. Haverkort, G. A. Sawatzky, S.D. Conradson, D. L. Clark, S. A. Kozimor, and K. S. Boland, Phys. Rev. B 81, 193104 (2010).
  • Supramolecular control of the magnetic anisotropy in two-dimensional high-spin Fe arrays at a metal interface : P. Gambardella, S. Stepanow, A. Dmitriev, J. Honolka, Frank de Groot, M. Lingenfelder, Subhra Sen Gupta, D. D. Sarma, P. Bencok, S. Stanescu, S. Clair, S. Pons, N. Lin, A. P. Seitsonen, H. Brune, J. V. Barth and K. Kern, Nature Materials (Letters) 8, 189 (2009).
  • Theory of the unusual doping and temperature dependence of photoemission spectra in manganites: Prabuddha Sanyal, Subhra Sen Gupta, Nandan Pakhira, H. R. Krishnamurthy, D. D. Sarma and T. V. Ramakrishnan, Europhysics Letters 82, 47010 (2008).
  • Spin-flop ordering from frustrated ferro- and antiferromagnetic interactions : A combined theoretical and experimental study of a Mn/Fe(100) monolayer : C. Grazioli, D. Alfe, S.R. Krishnakumar, Subhra Sen Gupta, M. Veronese, S. Turchini, N. Bonini, A. Dal Corso, D. D. Sarma, S. Baroni and C. Carbone, Phys. Rev. Lett. 95, 117201 (2005).
  • X-ray absorption spectroscopy of transition-metal doped oxide diluted magnetic semiconductors Zn1-xMxO : J. Okabayashi, K. Ono, M. Mizuguchi, M. Oshima, Subhra Sen Gupta, D. D. Sarma, T. Mizokawa, A. Fujimori, M. Yuri, C.T. Chen, T. Fukumura, M. Kawasaki and H. Koinuma, J. Appl. Phys. 95, 3573 (2004).
  • Synthesis and Characterization of Mn doped ZnO Nanocrystals : Ranjani Viswanatha, Sameer Sapra, Subhra Sen Gupta, B. Satpati, P. V. Satyam, B. N. Dev and D. D. Sarma, J. Phys. Chem. B 108, 6303 (2004).

Manuscripts in Preparation

  • “Hopping Anisotropy is not enough to explain Spin-reorientation Transitions : The Role of Multipole Coulomb Interactions” : Subhra Sen Gupta, Suman Mandal, Shinjini Paul, D. Sarma, and Priya Mahadevan. (Being prepared for submission to Physical Review).
  • “Non-uniform Wavefunction Multifractality in Disordered Quantum Spin models”, Debojyoti Kundu and Subhra Sen Gupta* (Being prepared for submission to Physical Review).
  • "A Possible Quantum Origin for Super-strong Magnetic Fields in some Magnetized White Dwarfs" : Subhra Sen Gupta* and Dhrubaditya Mitra* (Being prepared for submission to Not. R. Astron. Soc.).
  • “Bond Polarizability and large modification of the Hubbard U at the spin-state transition in Cobaltates” : Subhra Sen Gupta* and G. Sawatzky (Being prepared forsubmission to Physical Review).

  • “The Nature of Eigenstates in Disordered, Interacting Systems (and Some Special Random Matrix Models)" at the National Level Conference: “dd-Transitions 2024: A Discussion Meeting on the Electronic Structure of Materials”, held at Kurunji, Bhor, Maharashtra. (July, 2024).
  • “Chaos and Eigenstate Multifractality in Disordered Quantum Spin Systems and some Special Random Matrix Models" at the National Level Conference: “7th Annual Conference on Quantum Condensed Matter (QMAT 2024)”, held at Indian Institute of Technology (IIT) - Guwahati, India. (December, 2024).
  • “The Nature of Eigenstates in Disordered Quantum Many-body Systems and some Special Random Matrix Models" at the International Conference: “Asia-Pacific Conference on Condensed Matter Physics - 2024 (AC2MP 2024)”, held at Indian Institute of Technology (IIT) - Patna, Bihar, India. (December, 2024).
  • Chaos and Wavefunction Multifractality in Disordered Quantum Spin Systems at the National Conference: “8th Indian Statistical Physics Community Meeting (ISPCM-2023)”, held at TIFR-ICTS, Bangalore. (February, 2023).
  • “Chaos and Multifractality in Quantum Spin Systems" at the National Conference: “Young Investigator’s Meet on Quantum Condensed Matter Theory (YIMQCMT - 2022)” held at NISER, Bhubaneshwar. (November, 2022).
  • “Symmetry, Integrability and Chaos in Quantum Spin Systems" at the National Conference: “d-d Transitions: A Discussion Meeting on the Electronic Structure of Materials” held at Colva, Goa. (August, 2022).
  • "Universal Behaviour of Multi-point Spectral Correlations across Spectral Crossovers in Stochastic Quantum Spin Chains" at the International Conference: “5th Young Investigators Meet on Quantum Condensed Matter Theory (YIMQCMT-2021)” organized by NISER, Bhubaneshwar. (November, 2021).
  • "Spectral Crossovers and Universality in Quantum Spin-chains Coupled to Random Fields", at the International Conference: Interdisciplinary Topics in Advanced Materials (ITAM-2021), organized jointly by IISc and JNCASR, Bangalore. (July, 2021).
  • "Bond-polarizability induced Charge-Transfer to Mott-Hubbard Crossover at the Spin-state Transition in Cobaltates", at the 7th Indian Statistical Physics Community Meeting (ISPCM-2020) held at ICTS, Bangalore. (February, 2020).
  • "A Quantum Mechanism of Magnetism in White Dwarfs", at the 6th Indian Statistical Physics Community Meeting (ISPCM-2019) held at ICTS, Bangalore. (February, 2019).
  • "Magnetism in Super-Condensed Phases of Matter" at the Young Investigators Meet in Quantum Condensed Matter Theory (YIMQCMT-2018) held at S.N. Bose Centre, Kolkata. (November, 2018).
  • “Strong Hybridization Effects on the 'Hubbard U' and 'Hund's Rule' in Strongly Correlated Electron Systems” at the CMPU, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India. (June, 2015).
  • “Strong Hybridization Effects on the Hubbard U and the Hund’s coupling in Strongly Correlated Electron Systems” in the Department of Physics, University of Tokyo, Japan. (November, 2014).
  • “Unusual role of Multipole Coulomb Interactions in determining Spin-orientation on Correlated Surfaces” at the 6th Indo-Japan Meeting on Physics and Design of Multi-functional Correlated Materials, held at the University of Tokyo, Japan. (March, 2014).
  • “Breakdown of the single-site approximation in core-level X-ray spectroscopies” at the Saha Institute of Nuclear Physics (SINP), Kolkata, India. (December, 2012).
  • “An introduction to Non-resonant Inelastic X-ray Scattering (NIXS) – a versatile tool to study the electronic structure of complex oxides” at the Indo-EU ATHENA-2012 Advanced School on Modeling Complex Oxides, held at S. N. Bose National Centre for Basic Sciences. (April, 2012).
  • “Coexistence of bound and virtual-bound states in shallow-core to valence x-ray spectroscopies” at the S. N. Bose National Centre for Basic Sciences. (January, 2011).
  • “Non-resonant Inelastic X-ray Scattering (NIXS) in the Actinides and the Rare-earths: Some Generalities” at the X-ray Scattering Workshop at Stanford Institute of Materials and Energy Sciences Department, SLAC National Accelerator Laboratory, Stanford University, Palo Alto, USA. (August, 2009).

  • "Re-entrant Spectral Crossovers in Quantum Spin Chains: A Tale of Two Distinct Integrable Regimes Straddling A Quantum-Chaotic Phase", at the National Conference: “8th Indian Statistical Physics Community Meeting (ISPCM-2023)”, held at TIFR-ICTS, Bangalore (February, 2023). [Presented by Ph.D. Student, Debojyoti Kundu]
  • "Variable-Range Spectral Correlations in 1D Correlated Quantum Spin-Chains", at the National conference on Quantum Condensed Matter (QMAT - 2021), organized by TIFR, Mumbai (Online mode, December, 2021). [Presented by Student, Debojyoti Kundu]
  • "Long-range Spectral Statistics in a Variety of Correlated Spin Models: A Comparison with Random Matrix Theory", at the 5th Young Investigators Meet on Quantum Condensed Matter Theory (YIMQCMT-2021), organized by NISER, Bhubaneshwar (Online mode, November, 2021). [Presented by Student, Debojyoti Kundu]
  • "RMT Spectral Distribution Crossovers in Random Spin Chains", Oral Presentation at the APS March Meeting (Online Mode, March 2021). [Presented by Student, Debojyoti Kundu]
  • "Short and Long-range Spectral Statistics in a Variety of Correlated Spin Models: A Comparison with Random Matrix Theory", at the 7th Indian Statistical Physics Community Meeting (ISPCM2020), held at ICTS, Bangalore (February, 2020). [Presented by Student, Debojyoti Kundu]
  • "RMT Spectral Distribution Crossovers in Random Spin Systems", at the 6th Indian Statistical Physics Community Meeting (ISPCM2019), held at ICTS, Bangalore (February 2019). [Presented by Student, Debojyoti Kundu]
  • "Bond polarizability and large modification of the Hubbard U at the spin-state transition in Cobaltates", at the International Conference on Frontiers in Advanced Materials (FAM-2015), at the Indian Institute of Science, Bangalore, India. (June, 2015)
  • "Bond polarizability and large modification of the Hubbard U at the spin-state transition in Cobaltates", at the International Conference on Strongly Correlated Electron Systems (SCES-2014), at the Campus Saint Martin d’Hères, Grenoble, France. (July, 2014)
  • "Unusual role of Multipole Coulomb Interactions in determining Spin-orientation on Correlated Surfaces", at the Workshop on Oxide Electronics 20 (WOE20), at the National University of Singapore (NUS), Singapore. (September, 2013)
  • "The Importance of Inter-site Coherences in the X-ray Absorption Spectra of Mixed-valent Systems", at the MPI-UBC International School on Quantum Materials, held at the Max-Planck Institute for Solid State Research, Stuttgart, Germany. (October, 2010)
  • "High Momentum Transfer Shallow Core-to-valence Spectroscopy in the Actinides", at the APS March Meeting, held in Portland, Oregon, USA. (March, 2010)
  • "The Importance of High Momentum Transfer Shallow Core-to-valence Spectroscopy in the Actinides", at the PCAMM meeting, Simon Fraser University (SFU), Burnaby, Canada. (December, 2009)
  • "Non-resonant Inelastic X-ray Scattering (NIXS) in the Actinides and the Rare-earths: Some Generalities", at the Quantum Materials CIFAR Meeting, University of British Columbia (UBC), Vancouver, Canada. (May, 2009)
  • "Theoretical Investigation Of The Spin Reorientation Transition In Epitaxial Films Of NiO", at the International Conference on Magnetic Materials (ICMM), Saha Institute of Nuclear Physics (SINP), Kolkata, India. (December, 2007)
  • "Theory of the unusual doping and temperature dependent spectral weight transfer in the photoemission spectra of the manganites", at 1st Indo-Japan Conference, Indian Institute of Science (IISc), Bangalore, India. (February, 2006)

PROJECTS/GRANTS

  • Received 30,000 Grant as a part of of Approved OUR Project “Using Quantum Mechanics to understand Quantum Information and Quantum Entropies.” (2022-23).
  • Early Career Research Award (ECRA) Grant of SERB (DST), India, ECR/2016/002054 [3- year budget of ~ Rs. 21 Lakhs from 2018 - 2021, Successfully Completed and closed in 2022].
  • RIKEN FPR Research Grant of as a part of the RIKEN FPR Fellow Position at the RIKEN Wako Institute, Japan [3-year budget of ¥ 3 Million, 2013-2016].

PERFORMANCES

  • Spearheaded and Moderated the Panel Discussion on “The Indo-French Cooperation Perspectives in Quantum Technology”, featuring the famous French Nobel Laureate, Prof. Serge Haroche, along with three other National Experts on the subject, during Haroche's visit to SN IoE. (Held on 13 February, 2023). The Moderation and Discussion Session was very successful and applauded by many, including the Top Leadership at SN IoE