Who is Ashoke Sen? The First Indian Physicist to Win the Prestigious Oskar Klein Medal!
Ashoke Sen Receives Oskar Klein Medal
New Delhi: Renowned Indian physicist Ashoke Sen has been honored with the 2026 Oskar Klein Medal, marking a significant milestone as he becomes the first physicist from India to achieve this accolade.
Currently serving as the ICTS-Infosys Madhava Chair professor at the International Centre for Theoretical Sciences (ICTS) within the Tata Institute of Fundamental Research (TIFR) in Bengaluru, Sen is celebrated for his foundational contributions to modern string theory.
This theory suggests that the fundamental building blocks of matter are not point-like particles but rather tiny, one-dimensional strings. It aims to provide a comprehensive framework for understanding both matter and the forces that govern their interactions.
The Oskar Klein Medal, established in 1988 and named after the esteemed Swedish theoretical physicist Oskar Klein, is awarded annually by Stockholm University in collaboration with the Nobel Committee for Physics from the Royal Swedish Academy of Sciences.
Recognition and Contributions
The Office of the Principal Scientific Adviser to the Government of India congratulates Dr. Ashoke Sen, @ictstifr-Infosys Madhava Chair Professor, Bengaluru, on receiving the Oskar Klein Medal for 2026. He is the first Indian physicist to receive this prestigious honour.
Prof. Sen is globally recognised for his pioneering contributions to string theory, particularly his work on S-duality, the precision counting of black hole entropy and string field theory. His research has played a significant role in advancing modern string theory and deepening our understanding of fundamental physics.
Jointly awarded by @Stockholm_Uni and the Nobel Committee for Physics of the Royal Swedish Academy of Sciences, the Oskar Klein Medal recognises distinguished contributions to physics. This recognition adds to Prof. Sen’s distinguished achievements, which include the Breakthrough Prize in Fundamental Physics (2012), the Dirac Medal (2014), the Padma Shri (2001) and the Padma Bhushan (2013).
— Office of Principal Scientific Adviser to the GoI (@PrinSciAdvOff) October 23, 2026
In memory of Klein, the organizing committee of the Oskar Klein Memorial Lectures invites a distinguished researcher each year to deliver a lecture and receive the Klein medal.
On October 22, Sen presented a lecture titled 'Gravity from strings and strings from gravity' at the AlbaNova University Centre in Stockholm. His talk explored how string theory can lead to a coherent quantum theory of gravity and address significant challenges related to the quantum theory of black holes.
Sen's contributions, recognized by the Padma Shri (2001) and Padma Bhushan (2013), have significantly influenced the field through numerous theoretical breakthroughs. His work was pivotal in establishing that all string theories are different manifestations of a single underlying theory, earning him the Breakthrough Prize in Fundamental Physics in 2012.
Notable past recipients of the Oskar Klein Medal include Kip Thorne (2016), Peter Higgs (2009), Stephen Hawking (2003), and Nobel laureates Hans E. Bethe (1990), Steven Weinberg (1989), and Chen Ning Yang (1988).
Prof. Sen's international acclaim stems from his groundbreaking research on S-duality, precise black hole entropy counting, and string field theory, all of which have been instrumental in shaping the landscape of modern string theory, as highlighted by the ICTS.