Handhika S. Ramadhan, Ph.D was born in Jakarta, July 10 1983. He received his bachelor in physics from Universitas Indonesia (UI) in 2005. He pursued his doctoral study in theoretical physics at Tufts University in Medford, Massachussetts, USA, and obtained his PhD in 2011 with the dissertation title “Higher-dimensional topological defects in cosmology” under the supervision of Prof. Jose Juan Blanco-Pillado.

After a temporary appointment at Indonesian Institute of Sciences (LIPI), since 2013 Dr. Ramadhan has been a permanent faculty member at the Department of Physics at UI. His research interests include: topological defects and instantons in cosmology, modified gravity theories, classical and quantum aspects of black holes, and semiclassical gravity in compact objects.

1. Mathematical Methods in Physics

2. Classical Mechanics

3. Classical Electrodynamics

4. Relativistic Quantum Mechanics

5. Group Theory in Physics

6. Classical Field Theory

7. General Relativity

8. Introduction to Astrophysics.

##### Publications

- E. Acalapati, and H. S. Ramadhan,
*First-order formalism for Alice String*, Annals of Physics**465**, 169665 (2024). - H. S. Ramadhan, M. F. Ishlah, F. P. Pratama, and I. Alfredo,
*Strong lensing and shadow of Ayon-Beato–Garcia (ABG) nonsingular black hole,*European Physical Journal C**83**, 465 (2023). - A. S. Habibina and H. S. Ramadhan,
*Bound orbits around charged black strings*, Annals of Physics**448**, 169 (2023). - B. N. Jayawiguna, I. Prasetyo, A. Sulaksono, and H. S. Ramadhan,
*Ultracompact object within a nonlocal Tolman VII model*, Physical Review D**106**, 104020 (2022). - A. M. Kusuma, B. N. Jayawiguna, and H. S. Ramadhan,
*Thermodynamics of Eddington-inspired-Born-Infeld-AdS black holes with global monopole*, Physical Review D**104**, 124045 (2021). - A. S. Habibina, B. N. Jayawiguna dan H. S. Ramadhan,
*Bound orbits around charged black holes with exponential and logarithmic electrodynamics*, General Relativity and Gravitation**53**, 113 (2021). - I. Prasetyo, H. Maulana, H. S. Ramadhan, and A. Sulaksono,
*2.6M*⊙*Compact Object and Neutron Stars within Eddington-Inspired Born-Infeld Theory of Gravity*, Physical Review D**104**, 084029 (2021). - R. D. Lambaga, J. Kristiano, and H.S. Ramadhan,
*CdL Instanton in EiBI Gravity and the Failure of Thin-Wall Approximation*, Gravitation and Cosmology**27**, 143-151 (2021). - I. Prasetyo, H. S. Ramadhan, and A. Sulaksono,
*Ultra-compact objects from semi-classical gravity*, Physical Review D**103**, 123536 (2021).