Name: Contemporary Perspectives on Cosmology and Gravity
Start: 2025-11-24T09:00:00+01:00
End: 2025-11-28T18:30:00+01:00
Location: Institut Pascal

Contemporary Perspectives on Cosmology and Gravity

de lundi 24 novembre 2025 (09:00) à vendredi 28 novembre 2025 (18:30)

lundi 24 novembre 2025

10:00

10:00 - 11:00
11:00 Theories with Torsion and Nonmetricity: From cosmology to Astrophysics - Sebastián Bahamonde (Institute for Basic Science)
Theories with Torsion and Nonmetricity: From cosmology to Astrophysics
- Sebastián Bahamonde (Institute for Basic Science)
11:00 - 12:00
12:00 Lunch - Buffet
Lunch - Buffet
12:00 - 14:00

14:00

14:00 - 15:00
15:00 Imperfect dark matter with higher derivatives - Mohammad Ali Gorji (Institute for Basic Science (IBS))
Imperfect dark matter with higher derivatives
- Mohammad Ali Gorji (Institute for Basic Science (IBS))
15:00 - 16:00
16:00 Working in groups on common projects
Working in groups on common projects
16:00 - 18:00
mardi 25 novembre 2025

09:00

09:00 - 11:00
11:00 An extra-natrual mechanism of superheavy Kaluza-Klein particle production - Yusuke Yamada (IBS CTPU-CGA)
An extra-natrual mechanism of superheavy Kaluza-Klein particle production
- Yusuke Yamada (IBS CTPU-CGA)
11:00 - 12:00
12:00 Lunch
Lunch
12:00 - 13:30
13:30 Colloquium: Analogue Gravity and its applications to water waves - Scott Robertson (Institut Pprime / CNRS)
Colloquium: Analogue Gravity and its applications to water waves
- Scott Robertson (Institut Pprime / CNRS)
13:30 - 14:30
Analogue Gravity is a transdisciplinary field that explores and exploits the mathematical correspondence between, on one hand, field propagation in curved spacetime, and on the other, wave propagation in laboratory-based systems. In the long-wavelength limit, where the microscopic particulate nature of matter is lost from view, this correspondence is exact: the system is analogous to a gravitational one, with a background flow engendering an effective spacetime metric that governs the behaviour of wave-like perturbations. Unruh [Phys. Rev. Lett. 46, 1351 (1981)] was the first to suggest a concrete use of this analogy: to experimentally investigate Hawking radiation from black holes, which occur when the flow passes from a subcritical region to a supercritical one. The analogy can thus bring certain gravitational phenomena, hidden from view by practical difficulties, into the realms of observational accessibility via lab-based experiments. I will give an overview of Analogue Gravity and present some applications to the particular system of water waves, which is being studied at Institut Pprime near Poitiers.
14:30 Coffee break
Coffee break
14:30 - 15:00

15:00

15:00 - 17:00

17:00

17:00 - 19:00
mercredi 26 novembre 2025
10:00 Morning Session - 3 talks
Morning Session - 3 talks
10:00 - 11:15
Contributions

10:00 Non-Gaussianity of tensor induced density perturbations - Pritha Bari (University of Padova)

10:25 non-Markovianity in stochastic inflation - Tomotaka Kuroda (IBS-CTPU-CGA/Institute of Science Tokyo)

10:50 Decoherence of primordial perturbations in the view of a local observer - Fumiya Sano (Institute of Science Tokyo / Institute for Basic Science)
11:15 Coffee break
Coffee break
11:15 - 11:40
11:40 Morning session - 2 talks
Morning session - 2 talks
11:40 - 12:30
Contributions

11:40 Cosmological correlators beyond the de-Sitter lamppost - Yuhang Zhu (IBS-CTPU-CGA)

12:05 Nonsingular Cosmologies in Horndeski Gravity - Pavel Petrov (IBS CTPU CGA)
12:30 Lunch
Lunch
12:30 - 14:00
14:00 Secondary Gravitational Waves in Modified Gravity - Guillem Domenech (Leibniz University Hannover)
Secondary Gravitational Waves in Modified Gravity
- Guillem Domenech (Leibniz University Hannover)
14:00 - 15:00
15:00 Coffee break
Coffee break
15:00 - 15:30
15:30 Afternoon session - 3 talks
Afternoon session - 3 talks
15:30 - 16:45
Contributions

15:30 On the fate of explicit diffeomorphism violation in gravity - Nils A. Nilsson (IBS CTPU-CGA)

15:55 Imprints of energy injection by compact dark stars during reionization - Boris Betancourt (IBS-CTPU-CGA)

16:20 Termination of Superradiance from a Binary Companion - Huiyu Zhu (Institute for Basic Science)
16:45

16:45 - 19:00

19:00

19:00 - 21:00
jeudi 27 novembre 2025
10:00 Morning Session - 3 talks
Morning Session - 3 talks
10:00 - 11:15
Contributions

10:00 Black holes as a laboratory for dark matter - Qianhang Ding (Institute for Basic Science)

10:25 Slowly rotating black holes in scalar-tensor theories of gravity - Hugo CANDAN (Observatoire de Paris / IJCLab)

10:50 Theoretical filters for shift-symmetric Horndeski gravities - Theodoros Nakas (Institute for Basic Science, CTPU-CGA)
11:15 Coffee break
Coffee break
11:15 - 11:40
11:40 Morning session - 2 talks
Morning session - 2 talks
11:40 - 12:30
Contributions

11:40 Post-Newtonian tidal effects in the gravitational waveform from binary inspirals in scalar-tensor theories - Eve DONES (LUX - Observatoire de Paris)

12:05 Quantum Ghost - Atabak Jalali (CEICO, FZU)
12:30 Lunch
Lunch
12:30 - 14:00
14:00 On Testing General Relativity with Gravitational Waves and Neutron Stars - Mark Hertzberg (Tufts University)
On Testing General Relativity with Gravitational Waves and Neutron Stars
- Mark Hertzberg (Tufts University)
14:00 - 15:00
15:00 Coffee break
Coffee break
15:00 - 15:30
15:30 Afternoon session - 3 talks
Afternoon session - 3 talks
15:30 - 16:45
Contributions

15:30 A Photon Cloud Induced from an Axion Cloud - Zi-Yu Tang

15:55 Multimodal axion emissions from Abelian-Higgs cosmic strings - Michiru Uwabo (IBS-CTPU-CGA)

16:20 Decay and lifetime of oscillons coupled to an external scalar field: Insights from instability band analysis - Siyao Li (IBS CTPU-CGA/Institute of Science Tokyo)
16:45

16:45 - 18:00
vendredi 28 novembre 2025

09:00

09:00 - 10:30

10:30 Cosmology
Cosmology
10:30 - 12:00

12:00 Lunch
Lunch
12:00 - 14:00

14:00 Black holes
Black holes
14:00 - 15:30

15:30 Coffee break
Coffee break
15:30 - 16:00

16:00

16:00 - 18:00