About Our Center, Courtesy: American Physical Society (APS): 

IMPORTANT INFORMATION

The United Nations has proclaimed 2025 as the International Year of Quantum Science & Technology (IYQ): https://quantum2025.org/. Our centre, CQuERE, at our institute, TCG CREST, Kolkata, India, is celebrating this year of quantum through various activities and events throughout the year, viz. up to two invited expert talks every month, a conference every quarter in the first three quarters, followed by a grand finale international conference in December. You can find about these events, being organized by us, in our website, to be updated from time to time: https://www.tcgcrest.org/iyq2025/. For example, please see the below coverage (primarily in Bengali) on our first conference, International Symposium on Quantum Information and Communication (ISQIC), March 31 - April 02, 2025, and our centre and institute at large, by the national Doordarshan TV channel, DD Bangla, telecast at 8:00 pm IST on 6th May 2025:

my Selected works

1. S. Roy, F. Caruso, S. Patil, A. Mukhopadhyay, Efficient Learning of Arbitrary Single-Copy Quantum States, IEEE International Conference on Quantum Control, Computing and Learning (qCCL), Hong Kong, 2025, pp. 65-70, arXiv:2310.19748.

2. A. Mukhopadhyay, S. Roy, A. K. Pati, Unitality Conditions on Subsystems in Quantum Dynamics, IEEE International Conference on Quantum Control, Computing and Learning (qCCL), Hong Kong, 2025, pp. 71-75, arXiv:2502.11956.

3. A. Sharma, N. Deshpande, S. Ghosh, S. Das, S. Roy, An Efficient Quantum Algorithm for the Traveling Salesman Problem, Quantum Information and Computation 25, 71, 2025, Cryptology ePrint Archive Paper 2024/626.

4. S. Roy, I. R. Petersen, E. H. Huntington, Robust Adaptive Quantum Phase Estimation, New Journal of Physics 17 063020, 2015, arXiv:1412.4963.

5. S. Roy, I. R. Petersen, E. H. Huntington, Coherent-Classical Estimation for Linear Quantum Systems, Automatica 82 109, 2017, arXiv:1502.03729.

6. S. Roy, D. W. Berry, I. R. Petersen, E. H. Huntington, Robust Guaranteed-Cost Adaptive Quantum Phase Estimation, Physical Review A 95 052322, 2017, arXiv:1701.02928.

7. S. Roy, I. R. Petersen, Robust H∞ Estimation of Uncertain Linear Quantum Systems, International Journal of Robust & Nonlinear Control 26 3723, 2016, arXiv:1506.02005.

8. S. Roy, Fundamental Noisy Multiparameter Quantum Bounds, Scientific Reports 9 1038, 2019, arXiv:1805.07902.

9. N. Baskaran, A. S. Rawat, A. Jayashankar, D. Chakravarti, K. Sugisaki, S. Roy, S. B. Mandal, D. Mukherjee, V. S. Prasannaa, Adapting the Harrow-Hassidim-Lloyd Algorithm to Quantum Many-body Theory, Physical Review Research 5 043113, 2023, arXiv:2212.14781.

10. B. Coecke, A. Kissinger, A. Merry, S. Roy, The GHZ/W-Calculus Contains Rational Arithmetic, Electronic Proceedings in Theoretical Computer Science (EPTCS) 52 34, 2011, arXiv:1103.2812.