Cosmic Origins and the Search for New Physics
from
Monday, 19 January 2026 (05:15)
to
Friday, 23 January 2026 (20:00)
Monday, 19 January 2026
09:30
Welcome
09:30 - 09:45
Room: Saha and Sarabhai Auditoriums
09:45
Loop corrections to inflationary power spectra: Matteo Braglia
Matteo Braglia
09:45 - 10:30
Room: Saha and Sarabhai Auditoriums
10:30
Coffee Break
Coffee Break
10:30 - 11:00
Room: Saha and Sarabhai Auditoriums
11:00
Testing cosmic inflation with gravitational wave experiments: Gianmassimo Tasinato
Gianmassimo Tasinato
11:00 - 11:45
Room: Saha and Sarabhai Auditoriums
11:45
Gravitational Reheating: Debaprasad Maity
Debaprasad Maity
11:45 - 12:15
Room: Saha and Sarabhai Auditoriums
12:15
Route to Accurate Inference of Dark Energy using Gravitational Waves: Samsuzzaman Afroz
Samsuzzaman Afroz
12:15 - 12:35
Room: Saha and Sarabhai Auditoriums
12:35
Lunch
Lunch
12:35 - 14:00
Room: Saha and Sarabhai Auditoriums
14:00
21-cm cosmology - the global signal perspective: Mayuri Rao
Mayuri Rao
14:00 - 14:30
Room: Saha and Sarabhai Auditoriums
14:30
Primordial gravitational waves: Debika Chowdhury
Debika Chowdhury
14:30 - 15:00
Room: Saha and Sarabhai Auditoriums
15:00
Production of Gravitational Waves from Preheating and Tachyonic Instabilities: Khursid Alam
Khursid Alam
15:00 - 15:20
Room: Saha and Sarabhai Auditoriums
15:20
Coffee Break
Coffee Break
15:20 - 16:00
Room: Saha and Sarabhai Auditoriums
16:00
Primordial magnetism in the light of cosmic dawn and post-EoR observables: Arko Bhaumik
Arko Bhaumik
16:00 - 16:20
Room: Saha and Sarabhai Auditoriums
16:20
Gravitational Wave Signature and the Nature of Neutrino Masses: Majorana, Dirac, or Pseudo-Dirac?: Sudip Manna
Sudip Manna
16:20 - 16:40
Room: Saha and Sarabhai Auditoriums
16:40
Role of Next Generation Cosmological Surveys in Identifying Primordial Features: Debabrata Chandra
Debabrata Chandra
16:40 - 17:00
Room: Saha and Sarabhai Auditoriums
19:00
Dinner
Dinner
19:00 - 20:00
Room: Saha and Sarabhai Auditoriums
Tuesday, 20 January 2026
09:30
Entanglement and correlations between local observables in de Sitter spacetime: Ivan Agullo
Ivan Agullo
09:30 - 10:15
Room: Saha and Sarabhai Auditoriums
10:15
The High-redshift Universe in the Era of JWST and 21 cm Cosmology: Tirthankar Roy Choudhury
Tirthankar Roy Choudhury
10:15 - 11:00
Room: Saha and Sarabhai Auditoriums
11:00
Coffee Break
Coffee Break
11:00 - 11:30
Room: Saha and Sarabhai Auditoriums
11:30
Charting the unobservable -- The early-universe as an open quantum system: Suddhasattwa Brahma
Suddhasattwa Brahma
11:30 - 12:00
Room: Saha and Sarabhai Auditoriums
12:00
Scalaron dark matter dynamics in f(R) gravity: Koushik Dutta
Koushik Dutta
12:00 - 12:30
Room: Saha and Sarabhai Auditoriums
12:30
Lunch
Lunch
12:30 - 14:00
Room: Saha and Sarabhai Auditoriums
14:00
Exotic energy injection during cosmic dawn
-
Sergio Palomares Ruiz
Exotic energy injection during cosmic dawn
Sergio Palomares Ruiz
14:00 - 14:45
Room: Saha and Sarabhai Auditoriums
14:45
Gravitational wave background from primordial magnetic field
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Ramkishor Sharma
Gravitational wave background from primordial magnetic field
Ramkishor Sharma
14:45 - 15:15
Room: Saha and Sarabhai Auditoriums
15:15
Probing Extended Mass Distributions of Primordial Black Holes in NANOGrav and LVK
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Nilanjandev Bhaumik
Probing Extended Mass Distributions of Primordial Black Holes in NANOGrav and LVK
Nilanjandev Bhaumik
15:15 - 15:35
Room: Saha and Sarabhai Auditoriums
15:35
Coffee Break
Coffee Break
15:35 - 16:00
Room: Saha and Sarabhai Auditoriums
16:00
Dark matters are completely dark, or WIMPy, or FIMPy : An Inflationary gravitational particle production
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AYAN CHAKRABORTY
Dark matters are completely dark, or WIMPy, or FIMPy : An Inflationary gravitational particle production
AYAN CHAKRABORTY
16:00 - 16:20
Room: Saha and Sarabhai Auditoriums
16:20
Implications of self-interactions of ultralight dark matter at galactic scales
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Bihag Dave
Implications of self-interactions of ultralight dark matter at galactic scales
Bihag Dave
16:20 - 16:40
Room: Saha and Sarabhai Auditoriums
16:40
Loops in Cosmological Correlators
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Supritha Bhowmick
Loops in Cosmological Correlators
Supritha Bhowmick
16:40 - 17:00
Room: Saha and Sarabhai Auditoriums
19:00
Dinner
Dinner
19:00 - 20:00
Room: Saha and Sarabhai Auditoriums
Wednesday, 21 January 2026
09:30
Warm and Noisy Cosmological Fields
-
Mustafa Amin
Warm and Noisy Cosmological Fields
Mustafa Amin
09:30 - 10:15
Room: Saha and Sarabhai Auditoriums
10:15
Isocurvature bounds on PBHs and non-Gaussianity
-
Jinn-Ouk Gong
Isocurvature bounds on PBHs and non-Gaussianity
Jinn-Ouk Gong
10:15 - 11:00
Room: Saha and Sarabhai Auditoriums
11:00
Coffee Break
Coffee Break
11:00 - 11:30
Room: Saha and Sarabhai Auditoriums
11:30
Understanding the Universe with the cosmic microwave background
-
Rishi Khatri
Understanding the Universe with the cosmic microwave background
Rishi Khatri
11:30 - 12:00
Room: Saha and Sarabhai Auditoriums
12:00
Using the early universe as a quantum laboratory
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Patrick Peter
Using the early universe as a quantum laboratory
Patrick Peter
12:00 - 12:30
Room: Saha and Sarabhai Auditoriums
12:30
Lunch
Lunch
12:30 - 14:00
Room: Saha and Sarabhai Auditoriums
14:00
Reconstructing primordial features on large scales using machine learning
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Alipriyo Hoory
Reconstructing primordial features on large scales using machine learning
Alipriyo Hoory
14:00 - 14:20
Room: Saha and Sarabhai Auditoriums
14:20
Primordial Magnetogenesis as a Unified Origin of PBHs, Dark Matter, and Gravitational Waves
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SUBHASIS Maiti
Primordial Magnetogenesis as a Unified Origin of PBHs, Dark Matter, and Gravitational Waves
SUBHASIS Maiti
14:20 - 14:40
Room: Saha and Sarabhai Auditoriums
14:40
Asymmetries from Primordial Black Holes
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Koushik Loho
Asymmetries from Primordial Black Holes
Koushik Loho
14:40 - 15:00
Room: Saha and Sarabhai Auditoriums
15:00
Capturing the 21-cm signal in radio interferometers
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Asif Elahi
Capturing the 21-cm signal in radio interferometers
Asif Elahi
15:00 - 15:20
Room: Saha and Sarabhai Auditoriums
15:20
Coffee Break
Coffee Break
15:20 - 16:30
Room: Saha and Sarabhai Auditoriums
16:30
Chandrasekhar Lecture: Current and Future Prospects for the CMB-- Joseph Silk
Current and Future Prospects for the CMB-- Joseph Silk
16:30 - 18:00
Room: HSB 209, Seminar hall
19:00
Dinner
Dinner
19:00 - 20:00
Room: Department of Physics
Thursday, 22 January 2026
09:30
Cosmic Hum of Gravitational Waves from the Early Universe
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Suvodip Mukherjee
Cosmic Hum of Gravitational Waves from the Early Universe
Suvodip Mukherjee
09:30 - 10:15
Room: Saha and Sarabhai Auditoriums
10:15
Looking for new physics via CMB and Gravitational Waves
-
Nicola Bartolo
Looking for new physics via CMB and Gravitational Waves
Nicola Bartolo
10:15 - 11:00
Room: Saha and Sarabhai Auditoriums
11:00
Coffee Break
Coffee Break
11:00 - 11:30
Room: Saha and Sarabhai Auditoriums
11:30
Warm Inflation 2.0--The resurgence story
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Mayukh Gangopadhyay
Warm Inflation 2.0--The resurgence story
Mayukh Gangopadhyay
11:30 - 12:00
Room: Saha and Sarabhai Auditoriums
12:00
From Poles to Branch Cuts--Analytic Structure of Cosmological Correlators
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Diptimoy Ghosh
From Poles to Branch Cuts--Analytic Structure of Cosmological Correlators
Diptimoy Ghosh
12:00 - 12:30
Room: Saha and Sarabhai Auditoriums
12:30
Lunch
Lunch
12:30 - 14:00
Room: Saha and Sarabhai Auditoriums
14:00
Effects of dissipation during the accelerating epochs
-
Suratna Das
Effects of dissipation during the accelerating epochs
Suratna Das
14:00 - 14:30
Room: Saha and Sarabhai Auditoriums
14:30
Cosmological Dynamics of Scalar Fields in String-Motivated Models
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Ivonne Zavala
Cosmological Dynamics of Scalar Fields in String-Motivated Models
Ivonne Zavala
14:30 - 15:00
Room: Saha and Sarabhai Auditoriums
15:00
Primordial Magnetogenesis with Dark Photons
-
Debottam Nandi
Primordial Magnetogenesis with Dark Photons
Debottam Nandi
15:00 - 15:20
Room: Saha and Sarabhai Auditoriums
15:20
Coffee Break
Coffee Break
15:20 - 16:00
Room: Saha and Sarabhai Auditoriums
16:00
Power Suppression and Lensing Anomaly - A phenomenological investigation
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Roshana K
Power Suppression and Lensing Anomaly - A phenomenological investigation
Roshana K
16:00 - 16:20
Room: Saha and Sarabhai Auditoriums
16:20
Constraining the early universe with NANOGrav 15-year data
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Suvashis Maity
Constraining the early universe with NANOGrav 15-year data
Suvashis Maity
16:20 - 16:40
Room: Saha and Sarabhai Auditoriums
16:40
Anomalies and tensions in cosmology
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Purba Mukherjee
Anomalies and tensions in cosmology
Purba Mukherjee
16:40 - 17:00
Room: Saha and Sarabhai Auditoriums
19:00
Dinner
Dinner
19:00 - 20:00
Room: Saha and Sarabhai Auditoriums
Friday, 23 January 2026
09:30
Gauge fields and parity violation in the early universe
-
Rajeev Kumar Jain
Gauge fields and parity violation in the early universe
Rajeev Kumar Jain
09:30 - 10:15
Room: Saha and Sarabhai Auditoriums
10:15
Primary gravitational waves at high frequencies--Origin of suppression in the power spectrum
-
Jerome Martin
Primary gravitational waves at high frequencies--Origin of suppression in the power spectrum
Jerome Martin
10:15 - 11:00
Room: Saha and Sarabhai Auditoriums
11:00
Coffee Break
Coffee Break
11:00 - 11:30
Room: Saha and Sarabhai Auditoriums
11:30
Bayesian optimisation for efficient cosmological model selection
-
Ameek Malhotra
Bayesian optimisation for efficient cosmological model selection
Ameek Malhotra
11:30 - 11:50
Room: Saha and Sarabhai Auditoriums
11:50
Emergence of the exponential cut-off in the spectrum of PGWs at small scales
-
Arnab Paul
Emergence of the exponential cut-off in the spectrum of PGWs at small scales
Arnab Paul
11:50 - 12:10
Room: Saha and Sarabhai Auditoriums
12:10
AI/ML Techniques for Model-Independent Cosmological Analysis
-
Rahul Shah
AI/ML Techniques for Model-Independent Cosmological Analysis
Rahul Shah
12:10 - 12:30
Room: Saha and Sarabhai Auditoriums
12:30
Lunch
Lunch
12:30 - 14:00
Room: Saha and Sarabhai Auditoriums
14:00
Anchoring The Universe at Characteristic Redshifts and Measurement of the Hubble Parameter
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Anjan Ananda Sen
Anchoring The Universe at Characteristic Redshifts and Measurement of the Hubble Parameter
Anjan Ananda Sen
14:00 - 14:30
Room: Saha and Sarabhai Auditoriums
14:30
Validity of separate-universe approach in transient ultraslow-roll inflation
-
Rathul Nath Raveendran
Validity of separate-universe approach in transient ultraslow-roll inflation
Rathul Nath Raveendran
14:30 - 14:50
Room: Saha and Sarabhai Auditoriums
14:50
Non-minimal coupling of scalar fields in the dark sector and generalization of the top-hat collapse
-
Priyanka Saha
Non-minimal coupling of scalar fields in the dark sector and generalization of the top-hat collapse
Priyanka Saha
14:50 - 15:10
Room: Saha and Sarabhai Auditoriums
15:10
Inflationary trispectrum of gauge fields from scalar and tensor exchanges
-
Jishnu Sai
Inflationary trispectrum of gauge fields from scalar and tensor exchanges
Jishnu Sai
15:10 - 15:30
Room: Saha and Sarabhai Auditoriums
15:30
Closing remarks
Closing remarks
15:30 - 15:40
Room: Saha and Sarabhai Auditoriums
15:40
Coffee Break
Coffee Break
15:40 - 16:10
Room: Saha and Sarabhai Auditoriums
19:00
Dinner
Dinner
19:00 - 20:00
Room: Saha and Sarabhai Auditoriums