Manbendra Sharma

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Email: sharma.man@mahidol.ac.th
sharma.man@mahidol.ac.th
What we know is a drop, what we don’t know is an ocean–Isac Newton

Hi,

Welcome to my page. To introduce myself, I am a theoretical physicist working in the interface of quantum gravity and quantum cosmology. To give a glimpse of it, gravity is the most dominant force in the universe at large scale but the one that is least understood. Around three hundred fifty years ago seeing an apple fall before him, Newton proposed the universal law of gravitation. This states that the law that makes the apple fall on the surface of the earth is same as the law that governs the motion of the moon, earth and all celestial bodies. This was big leap of thought at that time. It was a statement of unification and “symmetry” in nature. And around hundred years ago Einstein showed that gravity arises as a result of general covariance, a symmetry statement indeed which we know today as General Theory of Relativity.

The story does not end there. A school of thought says that gravity, on its own right, must be quantized like other three fundamental forces. In essence, the underlying symmetries of general relativity must find its quantum analogue. And loop quantum gravity (LQG) is a tentative candidate to find the quantum analogue of Riemannian space in Dirac sense.

Using the framework of LQG, I work on the symmetry reduced quantum corrected dynamics of spacetime as applied to early universe, generally called loop quantum cosmology. One of the astounding results of these models is the resolution of singularity. To say it in a more creative way…perhaps,  the “apple” doesn’t “fall” at the minuscule scale.


Research Interest:  Quantum Gravity, Quantum Cosmology. 

Supervision Experience:

Currently supervising two doctoral students (one from MU and another from LPU)  on quantum cosmology. One of the students have already submitted his thesis. 

Work Experience:

  • Honorary Adjunct Faculty: in School of Chemical Engineering and Physical Sciences, Lovely Professional University Punjab, India, July/2024-present.
  • Lecturer: NAS, Mahidol University Nakhonsawan Campus, February/2023-present.
  • Visiting Research Fellow: IUCAA Pune, India, August/2022-February 2023.
  • Visiting Research Fellow:  Zhejiang University of Technology Hangzhou, China, November/2019-April/2020.
  • Post-Doctoral Fellow: Zhejiang University of Technology, Hangzhou, China, April/2017-November/2019.
  • Post-Doctoral Fellow: IISER-Mohali, India,  March/2016-March/2017.

Education:

List of Publication

‪Manabendra Sharma‬ – ‪Google Scholar‬

Invited Talks:       

 1.   “Aspects of Quantum Cosmology in the realm of Loop Quantum Gravity”  at Graduate Special Seminar  in the   Department of Physics and Material  Science  Chiang Mai University, Thailand.           

  2. “Quantum Geometric formulation of Brans-Dicke theory in Bianchi-I spacetime” at Arabica Coffee Talks in the National Research Institute of Technology Thailand.        

3. “Quantum Cosmology and Beyond”   talk given at Department of Computer Science and Mathematics, Chulalongkorn University.        

Publication with NAS affiliation:

 

1. Kaur, Jaskirat, S. D. Pathak, Maxim Khlopov, Maxim Krasnov, and Manabendra
Sharma. “Dynamics of Scalar Fields from a Generalized form of Lagrangian.”
Nuclear Physics B (2025): 117010.

2. Bhandari, Gaurav, S. D. Pathak, Manabendra Sharma, and Maxim Yu Khlopov.
“Quantum gravity corrections to Hawking radiation via GUP.” The European
Physical Journal Plus 140, no. 7 (2025): 663.

3. Kaur, Jaskirat, S. D. Pathak, Maxim Khlopov, and Manabendra Sharma. “In-
flection Point Dynamics of Minimally Coupled Tachyonic Scalar Fields.” Universe 11, no. 4 (2025): 131.

4. Bhandari, Gaurav, S. D. Pathak, and Manabendra Sharma . “Quantum Cor-
rected Brans-Dicke Cosmology.” International Journal of Geometric Methodsin Modern Physics (2025).

5. ∗ Bhandari, Gaurav, S. D. Pathak, and Manabendra Sharma. “Generalized un-
certainty principle and the Zeeman effect: Relativistic corrections unveiled.” Nuclear Physics B (2025): 116817.

6. ∗Sharma, Manabendrac, Gustavo S. Vicente, Leila L. Graef, Rudnei O. Ramos,
and Anzhong Wang. “Quantum geometric formulation of Brans-Dicke theory for Bianchi I spacetime.” Physical Review D 111, no. 4 (2025): 043501.

7. Bhandari, Gaurav, S. D. Pathak, Manabendra Sharma, and Anzhong Wang.
“Distortion of quintessence dynamics by the generalized uncertainty principle.” Annals of Physics 473 (2025): 169895.

8. Bhandari, Gaurav, S. D. Pathak, Manabendra Sharma, and Anzhong Wang.
“GUP deformed background dynamics of phantom field.” General Relativity
and Gravitation 56, no. 11 (2024): 139.

9. Patil, Trupti, Sukanta Panda, Manabendra Sharma, and Ruchika. “Dynamics
of interacting scalar field model in the realm of chiral cosmology.” The European Physical Journal C 83, no. 2 (2023): 131.

10. Sharma, Manabendra, Shankar Dayal Pathak, and Shiyuan Li. “Nonsingular
bouncing model in closed and open universe.” In Physical Sciences Forum, vol.
7, no. 1, p. 49. MDPI, 2023.

11. Kumar, Devanarayanan Rajeeb, Nibedita Chowdhury, S. D. Pathak, Umang Kumar, Manabendra Sharma, and Vikash Kumar Ojha. “An extensive analysis of Schwarzschild exterior solution.” Journal of High Energy Astrophysics 36
(2022): 111-119.

Teaching activities at NAS:

  • NWTP512 Quantum Mechanics (Sciama’s term 2024,  Sciama’s term 2025)
  • NWTP 521 Thermodynamics and Phase Transitions (Dirac’s  term, 2023, Dirac’s term 2025)
  • Group Theory and Symmetry (Taught at NAS-MUNA camp, July 2023)
  • NWTP862 Quantum Cosmology (Sciama’s  term, 2025)
  • NWTP702 Symmetries and Lei Algebra in Physics (Dirac’s term 2025)
  • NWTP801 Geometry and Topology  (to commence in Sciama’s term 2026)

Seminars at NAS:

1. KT-Seminar on 06/03/2023: “Pre-inflationary background dynamics of Loop Quantum Cosmology”.

2. KT-Seminar on 04/12/2023:  “Quantum Cosmology a la Polymerization”

3. KT-Seminar on 15/10/2025 “Quantum Gravity: ideas notion and philosophy”

4. KT-Seminar on 11/03/2025 “Quantum Gravity: Ideas, notion, not philosophy“

Central Activities at NAS: