The work that won Deepak Dhar the Dirac Medal | Explained

Indian theoretical physicist Deepak Dhar has been awarded the 2026 Dirac Medal, joining an elite group of scientists including Stephen Hawking, for his groundbreaking work in statistical mechanics. The honor was announced by the International Centre for Theoretical Physics (ICTP) on August 9, 2026, recognizing Dhar's significant contributions to the field. This marks another milestone in the career of the IINSA distinguished professor, who has spent decades advancing theoretical physics in India and internationally. Dhar, born in 1951 in Pratapgarh, Uttar Pradesh, began his academic journey in a Hindi-medium educational system. While his mother initially envisioned a future in public service, his father nurtured an interest in science through regular visits to libraries and the purchase of science magazines. One publication, Understanding Science, particularly influenced Dhar during his formative years. After studying at Allahabad University, he pursued his MSc at IIT Kanpur before traveling to the United States for further education. At the California Institute of Technology (Caltech), Dhar earned a Richard Feynman fellowship and worked under the guidance of the renowned physicist Richard Feynman. Serving as Feynman’s teaching assistant, Dhar completed his PhD in 1978. Despite opportunities to remain in the U.S., he returned to India after his doctoral studies, choosing to contribute to the growth of theoretical physics within his homeland. Since returning, Dhar has held positions at prestigious institutions such as the Tata Institute of Fundamental Research (TIFR) in Mumbai and IISER Pune, where he contributed to the development of physics education and mentored numerous students. At TIFR, he operated without a formal mentor but thrived within a robust community of theoretical physicists. Over the following decades, he made substantial contributions to statistical physics, notably developing Dhar’s burning algorithm, which has become a foundational concept in the study of self-organised criticality and complex systems. Dhar’s accomplishments have not gone unnoticed. In 2022, he became the first Indian to receive the Boltzmann Medal, a top honor in statistical physics. Reflecting on the achievement, Dhar emphasized that while he was the first Indian to win the medal, others had previously made notable contributions to the field. In 2023, the Government of India honored him with the Padma Bhushan, its third-highest civilian award, acknowledging his contributions to science and society. The Dirac Medal, established in 1985 by the ICTP, honors outstanding work in theoretical physics and mathematics. Unlike the Nobel, Fields, or Wolf Prizes, the Dirac Medal is not awarded to recipients of these accolades, though several past recipients have later won them. The award recognizes individuals whose work has significantly advanced the understanding of statistical mechanics, a field with applications ranging from artificial intelligence to financial markets. Dhar’s selection as one of four recipients for the 2026 Dirac Medal underscores his global influence in theoretical physics. His journey from a small town in Uttar Pradesh to becoming a leading figure in the field exemplifies the potential for scientific excellence rooted in diverse backgrounds. His return to India after training abroad highlights a broader trend of accomplished scientists choosing to build careers in their home countries, contributing to local academia and research ecosystems. Dhar’s work continues to inspire both current and future generations of physicists. His algorithms and theories provide essential tools for understanding complex systems, influencing disciplines beyond traditional physics. As the scientific community celebrates his latest recognition, Dhar remains focused on advancing knowledge and fostering innovation in the field of statistical mechanics.