Welcome to The Institute of Mathematical Sciences | The Institute of Mathematical Sciences

Upcoming Events

Jul 06
09:00-18:00

AMPS 2025 SCHOOL | AMPS 2025 SCHOOL

AMPS 2025 SCHOOL

Conference | E C G Sudarshan Hall

Jul 06
09:30-18:00

Prof. Sitabhra Sinha | IMSc

Conference | Ramanujan Auditorium

Jul 08
15:30-16:45

Arunava Mukherjee | Saha Institute of Nuclear Physics

Physics Colloquium | Alladi Ramakrishnan Hall

Jul 09
11:30-12:30

Shibendu Gupta Choudhury | CTP-JMI, Delhi

Physics Seminar | Alladi Ramakrishnan Hall

Jul 09
15:30-17:00

Ajoy Maji | Weizmann Institute of Science, Israel

TBA

Physics Seminar | E C G Sudarshan Hall


	The direct detection of gravitational waves about a decade ago heralded a new era of multi-messenger astronomy. The world also subsequently witnessed the first simultaneous observation of gravitational and electromagnetic radiations from a single astronomical event. The ongoing observations from the second-generation ground-based detectors, advanced LIGO-Virgo-KAGRA, have delivered several key scientific discoveries. In this talk, I will provide a bird's eye view of the detection techniques behind some of these key discoveries. In the last part, I will highlight the implications of multi-messenger observations from ultra-dense compact objects, e.g., neutron stars on the unexplored territory of fundamental physics.


	We present a composite framework to explore deviations from ΛCDM by independently parameterizing the background expansion and the growth of cosmic structures. Using current observational data, we find strong indications of deviation from ΛCDM in the background expansion, consistent with recent DESI DR2 results, while no significant departure is observed in the growth sector. This is primarily due to limitations in current growth measurements, making it difficult to distinguish between evolving dark energy and modified gravity. We further show how future high-precision surveys like Euclid can break this degeneracy and decisively test such scenarios.