Dr. Utpal Roy
Associate Professor
Ph.D, Physical Research Laboratory, Ahmedabad, India
Ph: +91-612-255 2007
Fax: +91-612-227 7383
Personal Group Webpage: https://sites.google.com/view/beciitp/home
Research Areas : Theoretical Research on
  • Quantum Sensing,
  • Bose-Einstein condensate,
  • Quantum Optics,
  • Quantum Computation
Professional Experience :
  • Associate Professor, Dept. of Physics, IIT Patna (Since Dec. 2015)
  • Assistant Professor, Dept. of Physics, IIT Patna (July, 2010 - Dec. 2015)
  • NITHEP Post Doctoral Fellow, School of Phys., Center for Quantum Tech., UKZN-(Westville Campus), Durban, SA (Jan-June, 2010)
  • Post Doctoral Fellow, Quantum Opt. & Quantum Inf. Group, Univ. of Camerino, Italy. ( 2008-2010 )
Student Guidance :
  • Ph.D thesis (Awarded): 03, (Submitted): 01
  • Current PhD students: 07
  • M.Tech thesis (Awarded): 03
  • M.Sc thesis (Awarded): 07
Courses Taught :
  • B.Tech : PH101:  Physics-I, PH102:  Physics-II, PH103: Physics (T), PH001 & PH002:  Physics-Prep, EP201: Quantum Mechanics
  • M.Tech: PH504:  Comp. Nanoscience, NT514: Topical Seminar, NT601 & 611: M.Tech Proj.-I & II
  • M.Sc: PH421: Mathematical Physics, PH425: Quantum Mechanics-I, PH521: Atomic & Molecular Physics,  PH602: Quantum Optics & Quantum Information, PH603: Physics of Ultracold Atoms
  • PH.D.: PH701: Mathematical Physics, PH703: Quantum & Statistical Mechanics, PH709: Physics of Nonlinear Systems
Recently Arranged (Selected Events) :
  • Convenor, SERB School on Nonlinear Dynamics (SERB), IIT Patna, December 03-31, 2019.
  • Convenor, International Conference on Quantum & Atom Optics, Dec. 16-18, 2018, IIT Patna.
  • Convenor, Workshop on the National Science Day Celebration & 125th Birth Anniversary of S. N. Bose, IIT Patna, 2018.
  • Convenor, Workshop on ‘Advances in Physics: From Concepts to Applications’, IIT Patna, 2017.
  • Course Director, Science Academies’ Refresher Course in Experimental Physics, November 07-22, 2017, IIT Patna.
  • Convenor, Workshop on ‘Concepts of Physics through Experiments’, IIT Patna, 2016.
Member of Professional bodies :
  1. Review Editor in “Frontiers in Quantum Science and Technology, (www.frontiersin.org)”.
  2. TCS-COIN partner for “Quantum Computation and Quantum Technology”, 2022.
  3. Life member of Indian Society of Atomic and Molecular Physics.
  4. Executive Committee Member, “Indian Society of Optics, Atomic & Molecular Physics”.
  5. Member of the Editorial Boards: ‘Trends in Comp. Sc. & Tech. (EISSN: 2641-3086)’; ‘World Research Journal of Applied Physics’.
  6. Reviewers of several International reputed peer reviewed journals.
Awards & Honours :
  1. Outstanding Teacher Award in Gold Category, "Science and Technology Academic, Innovations and Research Awards 2021".
  2. Bharat Vikas Award, Subject-Physics, ISR-India, 2018.
  3. There are 11 best paper/poster awards from the research group.
Current Ph.D. Students :

Burn Halder
AQ Batin

Vivek Mehta

Pradosh Basu

Sriganapathy Raghav
Vicky Sau
Vicky Sau

Jayashree Das

Sonali Jana
: Journal Publications:
  1. Tunnelling and Revival of Anderson Localization in Bose-Einstein Condensate, Sriganapathy Raghav, Barun Halder, PradoshBasu and Utpal Roy, Accepted for publication, Phys. Rev. A (2022). [IF-2.971]
  2. Generation of higher harmonics in dipolar Bose-Einstein condensates trapped in periodically-modulated potentials,J Bera, Abdul Q. Batin,S Ghosh, Boris Malomed and, Utpal Roy, Accepted for publication, Philos. Trans. R. Soc. A (2022). (A Royal Society, UK Publication). [IF-4.019]
  3. Solitary Matter Waves in a Tunable Bi-periodic Optical Lattice with Two- and Three-body Interactions, Ajay Nath, JayantaBera; M R. Pathak and Utpal Roy, Acceptedfor publication, Eur. Phys. J. D (2022). [IF-1.611]
  4. Quantum sensing with sub-Planck structures for the dynamics of Bose-Einstein condensate in presence of engineered potential barriers inside a harmonic trap, JayantaBera, Barun Halder, SuranjanaGhosh, Ray-Kuang Lee and Utpal Roy, Phys. Letts. A, 453, 128484 (2022). [IF-2.707]
  5. Quantum simulation of rogue waves in Bose-Einstein condensate: An exact analytical method, Nilanjan Kundu, Suranjana Ghosh and Utpal Roy, Phys. Letts. A, 449, 128335 (2022).[IF-2.707]
  6. Nonlinear Excitations in Ultracold Atoms Trapped in Triple Optical Lattices, PradoshBasu,Barun Halder,Sriganapathy Raghav and Utpal Roy, Condens. Matter, 7(3), 52 (2022).(Special Issue on Fluctuations and Highly Non-linear Phenomena in Superfluids and Superconductors III). [IF-2.25]
  7. Synergy between the negative absolute temperature and the external trap for a Bose-Einstein condensate under optical lattices, Nilanjan Kundu, Ajay Nath, Jayanta Bera,Suranjana Ghosh and Utpal Roy, Phys. Letts. A, 427, 127922, (2022).[IF-2.707]
  8. Exact Solutions for Solitary Waves in a Bose-Einstein Condensate under the Action of a Four-Color Optical Lattice, B Halder, S Ghosh, P Basu, JBera, BMalomed and Utpal Roy, Symmetry, 14(1), 49, (2022). [IF-2.940]
  9. Exact Analytical Model for Bose-Einstein Condensate at Negative Temperature, Ajay Nath, Jayanta Bera,Suranjana Ghosh and UtpalRoy,Scientific Reports, 10, 9016, (2020).[IF-4.996]
  10. Matter-wave fractional revivals in a ring waveguide, Jayanta Bera, Suranjana Ghosh, Luca Salasnich andUtpal Roy, Phys. Rev. A, 102, 063323, (2020).[IF-2.971]
  11. Soliton dynamics for an ingenious trap combination in a Bose-Einstein condensate, Ajay Nath, Jayanta Bera, Suranjana Ghosh, P.K. Panigrahi and, Utpal Roy, Eur. Phys. J. D 74, 27 (2020).[IF-1.611]
  12. Sub-fourier quantum metrology through bright solitary trains in Bose-Einstein condensate, Suranjana Ghosh, Jayanta Bera, P.K. Panigrahi and, Utpal Roy, Int. J. Quantum Inf., 17(02), 1950019 (2019).[IF-0.979]
  13. Mesoscopic quantum superposition of the generalized cat state: A diffraction limit, Suranjana Ghosh, Raman Sharma, Utpal Roy and P.K. Panigrahi, Phys. Rev. A, 92, 053819 (2015).[IF-2.971]
  14. A unified model for an external trap in a cigar-shaped Bose-Einstein condensate, Ajay Nath and, Utpal Roy, J. Phys. A: Math. Theor. 47 415301 (2014).[IF-2.331]
  15. Bose-Einstein condensate in a bichromatic optical lattice: An exact analytical model, Ajay Nath and, Utpal Roy, Laser Phys. Lett. 11 115501 (2014).(Selected IOP article for Free Access, Selected as Article of the year 2014). [IF-2.016]
  16. Enhanced quantum sensitivity in a vibrating diatomic molecule due to a rotational amendment, Suranjana Ghosh andUtpal Roy, Phys. Rev. A 90, 022113 (2014).[IF-2.971]
  17. Propagation of Spikes in Nonresonant Atomic Media: The Reduced Maxwell-Duffing Model, Utpal Roy, T. S Raju, P. K. Panigrahi and A. Rai, J. Non. Math. Phys. 18, 491 (2011). [IF-1.163]
  18. Gapped Solitons and Periodic Excitations in Strongly Coupled Bose-Einstein condensate, Utpal Roy, B. Shah and K. Abhinav and P. K. Panigrahi, J. Phys. B 44, 035302 (2011). [IF-1.917]
  19. Complex solitons in Bose-Einstein condensates with two- and three-body interactions, Utpal Roy, R. Atre, C. Sudheesh, C. N. Kumar, P. K. Panigrahi, J. Phys. B: At. Mol. Opt. Phys. 43, 025003 (2010). [IF-1.917]
  20. Sinusoidal Excitations in Two Component Bose-Einstein Condensates in a Trap, P. Das, T. S. Raju,Utpal Roy, P. K. Panigrahi, Phys Rev. A 79, 015601 (2009).[IF-2.971]
  21. Sub-Planck scale structures in a vibrating molecule in the presence of decoherence, S. Ghosh, Utpal Roy, C. Genes, and David Vitali, Phys. Rev. A 79, 052104 (2009).[IF-2.971]
  22. Sub-Planck scale structures in the Pöschl-Teller potential and their sensitivity to perturbations,Utpal Roy, S. Ghosh, P. K. Panigrahi, and David. Vitali, Phys. Rev. A 80, 052115 (2009).Selected in Physical Review Kaleidoscope of Nov. 09.[IF-2.971]
  23. Some intricacies of the momentum operator in quantum mechanics,Utpal Roy, S. Ghosh and K. Bhattacharya, Rev. Mex. de Fisica 54, 160 (2008).[IF-1.702]
  24. Soliton response to transient trap variations, S. SreeRanjani, Utpal Roy, P. K. Panigrahi, A. K. Kapoor, J. Phys. B 41, 235301 (2008).[IF-1.917]
  25. Coherent state of the Pöschl-Teller potential and their revival dynamics,Utpal Roy, J. Banerji and P. K. Panigrahi, J. Phys. A 38, 9115 (2005). [IF-2.132]

Book Chapters:

  1. Utpal Roy & PK Panigrahi, Strongly Coupled Bose-Einstein condensate, Macmilan, India, 2007, ISBN-10 0230634036.
  2. Utpal Roy & PK Panigrahi, Laser and Bose-Einstein Condensation Physics, Narosa, 2010, ISBN: 978-81-8487-064-0.

Peer Reviewed Conference Proceedings:

  1. Two Component Bose–Einstein Condensate in a Pöschl–Teller Potential, N. Kundu, U. Roy, Quantum Collisions and Confinement of Atomic and Molecular Species, and Photons, Springer Nature, 230, 130-136 (2019).
  2. “Isotope Separation of Bromine Molecules: A Novel Method,” B. Halder, U. Roy, J. Bera, S Ghosh, Quantum Collisions and Confinement of Atomic and Molecular Species, and Photons, Springer Nature, 230, 86-91(2019).
  3. “Long Time Evolution of a Bose–Einstein Condensate Under Toroidal Trap,” J. Bera, S. Ghosh, U. Roy, Quantum Collisions and Confinement of Atomic and Molecular Species, and Photons. Springer Nature, 230, 115-120 (2019).
  4. Sensitivity beyond standard quantum limit in molecular dynamics, S. Ghosh & U. Roy, J Laser Opt Photonics, 5, 50 (2018).
  5. Spatial interference patterns in the dynamics of a 2D Bose-Einstein condensate, J. Bera, U. Roy, AIP Conf. Proc., 1953, 140115 (2018).
  6. Sub-Planck structures and Quantum Metrology, P. K. Panigrahi, A. Kumar, Utpal Roy and  S Ghosh, AIP Series on 75 years of Quantum Entanglement 1384, 84 (2011).
Invited Talks
  1. Nobel Prize in Physics 2022: Quantum Entanglement & Quantum Technology, IAPT Convention, Patliputra Univ. Patna, 03 Dec, 2022.
  2. Effect of Trap Engineering in Bose-Einstein Condensate and Quantum Information, YIMQCMT-2022, NISER Bhubaneswar, Oct 29-Nov 01, 2022.
  3. Quantum Simulation and Quantum Sensing with Trapped Ultracold Atoms, “TAMIONS”, International Center for Theoretical Studies, TIFR, Bengaluru, 9-13 May, 2022.
  4. Few Prominent Directions to Ultracold Atom Research in Presence of External Potential, Quantum Information & Quantum Technology-2022, IISER Kolkata, 25th June, 2022.
  5. From Quantum Simulation to Quantum Sensing for Ultracold Matter Waves, Annual International Conference on Laser Optics and Photonics, June 10-12, 2022.
  6. Matter Waves in Tunable Optical Lattices for Quantum Simulation, Lecture Series in NLD, Bharathidasan Univ., Feb. 11, 2022.
  7. Fractional Revivals and Quantum Sensing for Trapped Ultracold Matter Waves, 2nd Edition of European Lasers, Photonics and Optics Technologies Summit, Paris, Virtual, September 05-06, 2022.
  8. 2nd Annual International Conference on Lasers, Optics, Photonics, Sensors & Ultrafast Nonlinear Optics, Virtual, June 10-12, 2022.
  9. Quantum Simulation with Ultracold Atoms and Coupled, Disordered Optical Lattices, “Young Investigator Meet on Quantum Condensed Matter Theory,” NISER Bhubaneswar, India, Nov. 16-19 (2021).
  10. Quantum Dynamics of Ultracold Atoms under Tunable Trap, Int. Webinar on Quantum Phys. and Nuclear Tech., Coalesce Research Group, USA, 27th July, 2021.
  11. Quantum Optics & Quantum Information: From Fundamentals to Applications, Victoria Inst., Univ. of Cal., India, 27th June, 2021.
  12. Bose-Einstein Condensate: Quantum Simulation & Quantum Information, QIQT-2021, IISER Kolkata, June 22, 2021.
  13. Quantum Simulation with Matter Waves in Engineered Optical Lattices, SuperFluctuations 2021, Camerino-Padova-Italy, June 14-16, 2021.
  14. Quantum Simulation and Quantum Sensors of matter waves, Special webinar, PSG College of Arts and Science, Coimbatore, 20 February, 2021.
  15. Ultracold atoms in disordered optical super-lattices, “Young Investigator Meet on Quantum Condensed Matter Theory,” NISER Bhubaneswar, 15-18 December, 2020.
  16. Negative Temperature in Bi-chromatic Optical Lattice, 2nd International Conference on Laser Technology 2020, London, UK, September 23-24, 2020.
  17. Quantum Precision Measurements in Trapped Ultracold Atoms, International Conference on Complex Quantum Systems (ICCQS-2020), BARC, Mumbai, March 4-7, 2020.
  18. Ultracold Atom Dynamics in Frustrated Optical Lattices, International Meet: Young Investigators Meet on Quantum Condensed Matter, S. N Bose Center, Kolkata (Dec. 23-27), 2019.
  19. Coherent Wavepackets of Light & Matter, International School on Quantum Information & Quantum Technology, IISER Kolkata (June-07-July 22), 2019.
  20. Advances of Quantum Technology, Refreshers course, IAPT, Patna University (May 27), 2019.
  21. Creation of mesoscopic superposition states in Bose-Einstein condensate using tunneling and reflection, International Conference on Quantum & Atom Optics, IIT Patna, Dec 16-18, 2018.
  22. Bose-Eintein Condensate in Frustrated Systems, Young Investigator Meet on Quantum Condensed Matter Theory, S. N. Bose National Centre for Basic Sciences, Kolkata, November 20 (2018).
  23. Condensate of Atom & Photon, RESPECT-KV workshop for Kendriya Vidyalaya Physics Teachers, 17-19th July 2018.
  24. Quantum Mechanics at the Coldest Temperature of the Universe, Workshop on the Centenary Celebration of Patna University, Title: 125th Birth-anniversary Celebration of Prof. S.N. Bose, Patna University, April 20, 2018.
  25. Two Component Bose-Einstein Condensate in a Bichromatic Optical Lattice, International Workshop on Bose-Einstein Condensation and Related Phenomena (IWBECRP), S. N. Bose National Centre, Kolkata, March 26-28 (2018).
  26. Interference of Bose-Einstein Condensate in a Toroidal Trap, one day workshop on National Science Day Celebration & 125th Birth Anniversary of S. N. Bose, IIT Patna, 6th March (2018).
  27. Molecular isotope separation by utilizing Sub-Planck scale structures, International conference on “Quantum & Nonlinear Optics Conference (QNO-2018), Kuala Lumpur, Malaysia, Feb 2-5 (2018).
  28. Breathing Dynamics of Ultracold Atoms in a Vibrated Optical Lattice, Topical Conference-07, Indian Society of Atomic & Molecular Physics, IISER Tirupati, Jan 6-8 (2018)
  29. Coherent Control of Bose-Einstein condensate under external confinement, 21st National Conference on Atomic & Molecular Physics (NCAMP-21), Physical Research Laboratory, Ahmedabad, Jan. 3-6, 2017.
  30. Trap Engineering in a Cigar-Shaped Bose-Einstein Condensate: Exact Analytical Approach, Frontiers in Light-Matter Interaction, IIT Ropar, March 4-5, 2016.
  31. Condensed Ultracold Atoms: A Room for New Technology, National Workshop on ‘Physics Education: Issues, Challenges and Strategies, Dept of Physics, Magadh Mahila College, Patna University, January 30-31, 2016.
  32. Cigar-shaped Bose-Einstein condensate under bichromatic optical lattices, 4th International conference on Current Development in Atomic, Molecular, Optical & Nano Physics with Applications, University of Delhi, March 11-14, 2015.
  33. Bose-Einstein condensate at negative temperature, International School and Discussion meeting on Light-Matter interactions, International Centre for Theoretical Studies, Indian Academy of Cultivation of Sciences Kolkata, India on 08-22 December, 2014.
  34. External Confinement: A key factor in the Dynamics of Bose-Einstein condensate, International Seminar on Current Trend in Quantum Gases, BEC and Solitons, Panjab University, Chandigarh, March 3-6, 2014.
  35. Confining trap for a cigar shaped Bose-Einstein condensate, International Conference on Recent trends in Computer and computational sciences (RETCOMP 2013), PES Institute of Technology, Bangalore, Jan 11-13, 2013.
  36. Dynamics of cigar shaped BEC in time and space varying external trap, DAE-BRNS symposium on Atomic, Molecular and Optical Physics, Indian Institute of Science Education and Research, Kolkata, Dec 14-16, 2012.
  37. Bose-Einstein Condensate & Control of Quantum Interferences, International School on Quantum & Nano Computing System & Application, Dayalbagh Educational University, Agra, Nov 30 - Dec 02, 2012.
  38. Coherent control of solitons in quasi 1D-BEC, 3nd International Conference on “Current Developments in Atomic, Molecular, Optical & Nano Physics” CDAMOP 2011, University of Delhi, December 14-16, 2011.
  39. Faraday wave as a probe to BEC with various interactions, International Conference on Quantum Optics and Quantum Computing (ICQOQC-11), Jaypee Institute of Information Technology, Noida, India, March 24-26, 2011.
  40. Frontier of optics and atomic physics, HCU-TIFR Discussion meeting, Hyderabad Central University, Hyderabad, India, July 1-3, 2011.
  41. Airy pulse in spontaneous parametric down conversion, Summer School on Scalable Quantum Computing with Light and Atoms (SCALA), Institut d’Optique, Corsica, France, August 17-29, 2009.
  42. Complex Soliton in BEC with Two- and Three-body interactions, International       Conference on Cold Atoms (ICCA), Indian Institute of Science Education and Research (IISER)-Kolkata, Kolkata, India, December 16-21, 2008.
  43. Solitons in Bose-Einstein condensate and other nonlinear media, Workshop at Department of Physics, University of Camerino, Italy, February 4, 2008.
  44. Solitons in strongly coupled cigar-shaped Bose-Einstein condensate, Int. Symp. on Quantum Optics, Physical Research Laboratory, Ahmedabad, India, July 24-27, 2006.
  45. Dynamics of Bose Einstein condensates, weak and strong interactions, Workshop on Quantum Optics & Quantum Information, Physical Research Laboratory, Ahmedabad, India, March 16, 2006.
  46. Useful states for quantum computation from coherent States, International Workshop on Quantum Information, Computation and Communication (QICC 2005), Center for theoretical Studies, IIT Kharagpur, India, February 15-18, 2005.