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IInvenTiv2026

Faculty details

Prof.Sudipto Singha Roy

Designation: Assistant Professor

Department: Physics

Email: sudipto[at]iitism[dot]ac[dot]in

Contact Number:

Office Number: +91-326-223-5555

Personal Page: Click Here

About Me: I am a theorist working in the field of Quantum Information and Computation. My research also have overlap with other interface areas like quantum many-body physics, open quantum systems, etc.

Research Interest: Quantum Information & Quantum Computation theory, Interface Of Quantum Information & Quantum Many-body Systems, Tensor Network Formalism, Open Quantum Systems, Non-Hermitian Physics

Curriculum
Vitae
Publications

Teaching

Winter 2023-24:

  1. Computational Physics (PHD502)

Summer 2023-24:

  1. Electrodynamics (PHC208)

Monsoon 2024-25:

  1. Quantum Computation and Information (NPHD/PHD510)
  2. Computation & Simulation (PHC517)
  3. 1st year B-Tech practical (PHI102)

Winter 2024-25:

  1. Computational Physics (PHD/NPHD502)
  2. 1st year B-Tech practical (NPHI102)

Monsoon 2025-26:

  1. Quantum Computation and Information (NPHD/PHD510)
  2. Experimental Physics (Python+Matlab Programming) (PHC516)

Winter 2025-26:

  1. Computational Physics (PHD/NPHD502)
  2. 1st year B-Tech practical (NPHI102)

Monsoon 2026-27:

  1. Quantum Computation and Information (NPHD/PHD510)
  2. Experimental Physics (Python+Matlab Programming) (PHC516)

Academics

Education
2012-2017 Ph.D. in Quantum information theory at Harish-Chandra Research Institute, Prayagraj (Allahabad), India. Advisor: Prof. Ujjwal Sen.
2010-2012 M. Sc in Physics from Indian Institute of Technology, Bombay, Mumbai, India 
2007-2010 B.Sc. with Honours in Physics from Ramakrishna Mission Vidyamandira, Belur, Howrah, University of Calcutta, Kolkata, India

Position

2024, Feb–present: Assistant Professor, Department of Physics at Indian Institute of Technology (Indian School of Mines), Dhanbad, India.

2022, Feb–2024, Feb: Postdoctoral Fellow with Prof. Philipp Hauke at INO-CNR BEC Center of Dipartimento di Fisica Università di Trento, Trento, Italy.

2018, Nov–2022, Jan: Postdoctoral Fellow with Prof. Germán Sierra under the Severo Ochoa program at Instituto de Fısica Teórica, Universidad Auto ́noma de Madrid, CSIC, Madrid, Spain.

2017, Sept-2018, Aug: Postdoctoral Fellow with Prof. Joonwoo Bae at Quantum Information Theory, Department of Applied Mathematics, Hanyang University (ERICA), Ansan, South Korea.

Awards and Honors

  • Inspire Scholarship 2007-2012 for being among the top 1 percent at West Bengal Council of Higher Secondary Education, West Bengal, India.
  • Merit cum Means Scholarship in 2012 from IIT Bombay
  • Ranked 56 in JAM examination (2010)
  • Ranked 43 in JEST (2012)
  • Qualified CSIR-NET (2012)
  • Infosys Prize of Harish-Chandra Research Institute 2017 for distinction in research in quantum information.
  • Severo Ochoa Postdoctoral fellowship
  • IOP trusted review status
  • Faculty Research Scheme grant awarded by IIT(ISM) Dhanbad as PI in 2024
  • Recepeints of Advanced Research Grant (ARG) by ANRF as Co-PI in 2025
  • Recepeints of Prime minister early career research grant (PMECRG) by ANRF as PI in 2026

Publications

List Of Research Publications (only in Peer-reviewed Journals)

 

Summary of publication:

Total articles: 36

In communications: 3

Total Published: 33

Physical Review Letters: 1

Physical Review A: 9

Physical Review B: 8

Physical Review E: 1

New Journal of Physics: 3

Journal of Physics A: Mathematical and Theoretical: 3

Reports on Progress in Physics: 1

Physics Letters A: 2

Journal of Magnetism and Magnetic Materials: 2

Europhysics Letters: 1

Journal of Physics B: Atomic, Molecular and Optical Physics: 1

Journal of Statistical Mechanics: Theory and Experiment: 1

 

Publication details: (in reverse chronological order)

1. Arkaprava Sil, Sudipto Singha Roy, "Quantum Complexity in Rule-Based Constrained Many-Body Models: Scars, Fragmentation, and Chaos”, 

Journal details: Physical Review B  114, 024312(2026)

DOI: https://doi.org/10.1103/ps6c-c3s8

Impact factor: 3.908

2. Soumik Bandyopadhyay, Philipp Hauke, Sudipto Singha Roy, “Quantifying non-Hermiticity using single- and many-particle quantum properties”,

Journal details: Physical Review B  112, 134201 (2025)

DOI: https://doi.org/10.1103/xm96-zxsw

Impact factor: 3.908

3. Sudipto Singha Roy, Soumik Bandyopadhyay, Ricardo Costa de Almeida, Philipp Hauke, "Unveiling Eigenstate Thermalization for Non-Hermitian systems", Physical Review Letters, 134 180405 (2025).

DOI: https://doi.org/10.1103/PhysRevLett.134.180405

Impact factor: 8.00

4. Gopal Chandra Santra, Sudipto Singha Roy, Daniel J. Egger, and Philipp Hauke, “Genuine Multipartite Entanglement in Quantum Optimization”,

Journal details: Physical Review A 111, 022434

DOI: https://doi.org/10.1103/PhysRevA.111.022434

Impact factor: 2.971

5. Silvia N. Santalla, Giovanni Ramı́rez, Sudipto Singha Roy, Germán Sierra, Javier Rodrı́guez-Laguna, “Entanglement links and the quasiparticle picture”,

Journal details: Physical Review B (Letter) 107, L121114 (2023),

DOI: https://doi.org/10.1103/PhysRevB.107.L121114

Impact factor: 3.908

6. Sudipto Singha Roy, Leon Carl, Philipp Hauke, “Genuine multipartite entanglement in a one-dimensional Bose-Hubbard model with frustrated hopping”,

Journal details: Physical Review B 106, 195158 (2022),

DOI:https://doi.org/10.1103/PhysRevB.106.195158

Impact factor: 3.908

7. Sudipto Singha Roy, Giovanni Ramı́rez, Silvia N. Santalla, Germán Sierra, Javier Rodrı́guez- Laguna, “Exotic correlation spread in free-fermionic states with initial patterns”,

Journal details: Physical Review B 105, 214306 (2022),

DOI:https://doi.org/10.1103/PhysRevB.105.214306

Impact factor: 3.908

8. Sudipto Singha Roy, Anindita Bera, Germán Sierra, “Simulating violation of causality using a topological phase transition”,

Journal details: Physical Review A 105, 032432 (2022),

DOI:https://doi.org/10.1103/PhysRevA.105.032432

Impact factor: 2.971

9. B. C. Hiesmayr, D. McNulty, S. Baek, S. Singha Roy, J. Bae, D. Chruściński, “Detecting Entanglement can be More Effective with Inequivalent Mutually Unbiased Bases”,

Journal details: New Journal of Physics 23, 093018 (2021),

DOI: https://doi.org/10.1088/1367-2630/ac20ea

Impact factor: 3.716

10. Sreetama Das, Sudipto Singha Roy, Samyadeb Bhattacharya, Ujjwal Sen, “Nearly Markovian maps and entanglement-based bound on corresponding non-Markovianity”,

Journal details: Journal of Physics A: Mathematical and Theoretical 54, 395301(2021).

DOI: https://doi.org/10.1088/1751-8121/ac1d8b

Impact factor: 2.132

11. Sudipto Singha Roy, Silvia N. Santalla, Germán Sierra, Javier Rodrı́guez-Laguna, “Link representation of the entanglement entropies for all bipartitions”,

Journal details: Journal of Physics A: Mathematical and Theoretical 54, 305301 (2021).

DOI: https://doi.org/10.1088/1751-8121/ac0a30

Impact factor: 2.132

12. Sudipto Singha Roy, Silvia N. Santalla, Javier Rodrı́guez-Laguna, Germán Sierra, “Bulk-edge correspondence in the Haldane phase of the bilinear-biquadratic spin-1 Hamiltonian”,

Journal details: Journal of Statistical Mechanics: Theory and Experiment 053102 (2021).

DOI: https://doi.org/10.1088/1742-5468/abf7b4

Impact factor: 2. 232

13. Sudipto Singha Roy, Silvia N. Santalla, Javier Rodrı́guez-Laguna, Germán Sierra, “Entanglement as geometry and flow”,

Journal details: Physical Review B 101, 195134 (2020),

DOI: https://doi.org/10.1103/PhysRevB.101.195134

Impact factor: 3.908

14. Sudipto Singha Roy, Utkarsh Mishra, Debraj Rakshit, “Trends of information backflow in disordered spin chains”,

Journal details: Euro Physics Letters 129, 30005 (2020),

DOI: https://doi.org/10.1209/0295-5075/129/30005

Impact factor: 1.947

15. Anindita Bera, Sudipto Singha Roy, “Growth of genuine multipartite entanglement in random unitary circuits”,

Journal details: Physical Review A 102, 062431 (2020),

DOI: https://doi.org/10.1103/PhysRevA.102.062431

Impact factor: 2.971

16. Sreetama Das, Chiranjib Mukhopadhyay, Sudipto Singha Roy, Samyadeb Bhattacharya, Aditi Sen De, Ujjwal Sen, “Wave-particle duality employing quantum coherence in superposition with non-orthogonal pointers”,

Journal details: Journal of Physics A: Mathematical and Theoretical 53, 115301(2020),

DOI: https://doi.org/10.1088/1751-8121/ab741f

Impact factor: 2.132

17. Sudipto Singha Roy, Himadri Shekhar Dhar, “Effect of long-range interactions on multipartite entanglement in Heisenberg chains”,

Journal details: Physical Review A 99, 062318 (2019),

DOI: https://doi.org/10.1103/PhysRevA.99.062318

Impact factor: 2.971

18. Sudipto Singha Roy, Himadri Shekhar Dhar, Aditi Sen De, Ujjwal Sen, “Fibonacci sequence and its generalizations in doped quantum spin ladders”,

Journal details: Journal of Magnetism and Magnetic Materials 478, 100 (2019),

DOI: https://doi.org/10.1016/j.jmmm.2019.01.064

Impact factor: 2.993

19. Sudipto Singha Roy, Joonwoo Bae, “Information-Theoretic Meaning of Quantum Information Flow and Its Applications to Amplitude Amplification Algorithms”,

Journal details: Physical Review A 100, 032303 (2019),

DOI: https://doi.org/10.1103/PhysRevA.100.032303

Impact factor: 2.971

20. Sudipto Singha Roy, Himadri Shekhar Dhar, Aditi Sen De, Ujjwal Sen, “Tensor-network approach to compute genuine multisite entanglement in infinite quantum spin chains”,

Journal details: Physical Review A 99, 062305 (2019),

DOI: https://doi.org/10.1103/PhysRevA.99.062305

Impact factor: 2.971

21. Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit, Aditi Sen De, Ujjwal Sen, “Response to defects in multi-and bipartite entanglement of isotropic quantum spin networks”,

Journal details: Physical Review A 97, 052325 (2018),

DOI: https://doi.org/10.1103/PhysRevA.97.052325

Impact factor: 2.971

22. Anindita Bera, Utkarsh Mishra, Sudipto Singha Roy, Anindya Biswas, Aditi Sen De, Ujjwal Sen, “Benford analysis of quantum critical phenomena: First digit provides high finite-size scaling exponent while first two and further are not much better”,

Journal details: Physics Letters A 382, 1639 (2018),

DOI: https://doi.org/10.1016/j.physleta.2018.04.020

Impact factor: 2.707

23. Sreetama Das, Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit, Aditi Sen De, Ujjwal Sen, “Adiabatic freezing of entanglement with insertion of defects in a one-dimensional Hubbard model”,

Journal details: Physical Review B 98, 125125 (2018),

DOI: https://doi.org/10.1103/PhysRevB.98.125125

Impact factor: 3.908

24. Mahasweta Pandit, Sreetama Das, Sudipto Singha Roy, Himadri Shekhar Dhar, and Ujjwal Sen, “Effects of cavity-cavity interaction on the entanglement dynamics of a generalized double Jaynes- Cummings model”,

Journal details: Journal of Physics B: Atomic, Molecular and Optical Physics 51, 045501 (2018),

DOI: https://doi.org/10.1088/1361-6455/aaa2cf

Impact factor: 1.917

25. Anindita Bera, Tamoghna Das, Debasis Sadhukhan, Sudipto Singha Roy, Aditi Sen De, Ujjwal Sen, “Quantum discord and its allies: a review of recent progress,”

Journal details: Report on Progress in Physics 81, 024001 (2018),

DOI: https://doi.org/10.1088/1361-6633/aa872f

Impact factor: 17.26

26. Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit, Aditi Sen De, Ujjwal Sen, “Detecting phase boundaries of quantum spin-1/2 XXZ ladder via bipartite and multipartite entanglement transitions”,

Journal details: Journal of Magnetism and Magnetic Materials 444, 227 (2017),

DOI: https://doi.org/10.1016/j.jmmm.2017.07.101

Impact factor: 2.993

27. Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit, Aditi Sen De, Ujjwal Sen, “Analytical recursive method to ascertain multisite entanglement in doped quantum spin ladders”,

Journal details: Physical Review B 96 075143 (2017),

DOI: https://doi.org/10.1103/PhysRevB.96.075143

Impact factor: 3.908

28. Debasis Sadhukhan, Sudipto Singha Roy, Amit Kumar Pal, Debraj Rakshit, Aditi Sen De, Ujjwal Sen, “Multipartite Entanglement Accumulation in Quantum States: Localizable Generalized Geometric Measure”,

Journal details: Physical Review A 95, 022301 (2017),

DOI:https://doi.org/10.1103/PhysRevA.95.022301

Impact factor: 2.971

29. Asutosh Kumar, Sudipto Singha Roy, Amit Kumar Pal, R Prabhu, Aditi Sen De, Ujjwal Sen , “Conclusive Identification of Quantum Channels via Monogamy of Quantum Correlations”,

Journal details: Physics Letters A 380, 3588 (2016),

DOI: https://doi.org/10.1016/j.physleta.2016.08.039

Impact factor: 2.707

30. Tamoghna Das, Sudipto Singha Roy, Shrobona Bagchi, Avijit Misra, Aditi Sen De, Ujjwal Sen, “Generalized Geometric Measure of Entanglement for Multiparty Mixed States”,

Journal details: Physical Review A 94, 022336 (2016),

DOI: https://doi.org/10.1103/PhysRevA.94.022336

Impact factor: 2.971

31. Debasis Sadhukhan, Sudipto Singha Roy, Debraj Rakshit, R Prabhu, Aditi Sen De, Ujjwal Sen, “Quantum discord length is enhanced while entanglement length is not by introducing disorder in a spin chain”,

Journal details: Physical Review E 93, 012131 (2016),

DOI: https://doi.org/10.1103/PhysRevE.93.012131 Impact factor: 2.707

32. Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit, Aditi Sen De, Ujjwal Sen, “Diverging scaling with converging multisite entanglement in odd and even quantum Heisenberg ladders”,

Journal details: New Journal of Physics 18, 023025 (2016),

DOI: https://doi.org/10.1088/1367-2630/18/2/023025  Impact factor: 3.716

33. Debasis Sadhukhan, Sudipto Singha Roy, Debraj Rakshit, Aditi Sen De, Ujjwal Sen, “Beating no-go theorems by engineering defects in quantum spin models”,

Journal details: New Journal of Physics 17, 043013 (2015),

DOI: https://doi.org/10.1088/1367-2630/17/4/043013 ,

Impact factor: 3.716

 

In communication

 

 

1.  Silvia N. Santalla, Sudipto Singha Roy, Germán Sierra, Javier Rodríguez-Laguna, “The hyperlink representation of entanglement and the inclusion-exclusion principle”,  arXiv:2601.17926 [quant-ph] (2026).

 

2. Paranjoy Chaki, Arkaprava Sil, Priya Ghosh, Ujjwal Sen, Sudipto Singha Roy, "Resource generation and dynamical complexities in open random quantum circuits", arXiv:2605.20350 [quant-ph] (2026). 

 

3. Leela Ganesh Chandra Lakkaraju , Soumik Bandyopadhyay,   Sudipto Singha Roy, Philipp Hauke, "Observable signatures of exceptional points from left-right eigenstate distinction", arXiv:2606.11333 [quant-ph] (2026). 

 
 

 

Conference Proceedings

1.  Sudipto Singha Roy, Silvia N. Santalla, Javier Rodríguez-Laguna, Germán Sierra, “Emergent geometry from entanglement structure”, Quantum Theory and Symmetries, Proceedings of the 11th International Symposium, Montreal, Canada, Springer International Publishing, Page 347-357 (2021),

DOI: https://10.1007/978-3-030-55777-5

Projects & Activities

Sponsored Research Projects (External Funded)

1. Recipient of the Faculty Research Scheme (FRS) Grant, by IIT (ISM) Dhanbad in 2024 as  PI
Project Title: Quantum Metrological Advances in Non-Hermitian Systems
Estimated Cost: INR 20 Lakhs

2. Recipient of the Advanced Research Grant (ARG), by ANRF in 2025 (Co-PI)
(PI: Prof. Ujjwal Sen, HRI, India; Co-PI: Dr. Anindita Bera, BIT Mesra, India)
Project Title: Engineering Quantum Networks for Scalable Quantum Technology
Estimated Cost: INR  14, 40,000 

3. Recipient of the Prime Minister's Early Career Research Grant  (PMECRG) Grant by ANRF in 2026,  as  PI
Project Title: Complexity-Aware Hamiltonian Engineering for Non-Ergodic Quantum Dynamics
Estimated Cost: To be sanctioned

Other Academic and Administrative Activities

  1. Co-incharge of MSc Physics lab
  2. Memeber of DPGC of Department of Physics 2024 Oct- 2026 June
  3. Social media incharge  
  4. Editor of Departmental's News Letter "Physics Pulse" 2025 July-2026 June 
  5. Mentor of UG students 2024-25, 2025-26 

Guidance

PHD:

1. Arkaprava Sil (Joined in July, 2024),

2. Prasant Mallik (Joined in July, 2024),

3. Debasmita Chatterjee (Joined in July, 2026)

 

UG:  1. Hyndavi Anand (2025)--> Now doing Masters in Quatum Technology, Upsala University 

PG:

1. Rudraksh Kaushik (2026), ---> will be joining IIT Delhi as PhD scholar

2. Souvik Kundu (2026)

Summer Project:

1. Avik Devsharma (IISER Kolkata), SRIS Program, self funded (INSPIRE), 2024 

2. Saikat Panja (IIT(ISM) Dhanbad), SRIS Program, self funded, 2025

3. Radhika Agrawal (IIT(ISM) Dhanbad), SRIS Program, Institute funded, 2025

4. Moirangthem Denison Meitei (IISER Pune), SRIS Program, Institute funded, 2026

 

 

 

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