Name: Gravity2026: New Frontiers in Cosmology
Start: 2026-04-27T00:30:00+09:00
End: 2026-05-01T18:15:00+09:00
Location: CTPU, IBS HQ

Gravity2026: New Frontiers in Cosmology

from Monday, 27 April 2026 (00:30) to Friday, 1 May 2026 (18:15)

Monday, 27 April 2026

08:00 Registration
Registration
08:00 - 09:00

09:00 Social: Opening remarks
Opening remarks
09:00 - 09:20
09:20 Invited: Changbom Park - "No Evidence for a Phantom-Divide-Crossing Dark Energy"
Changbom Park - "No Evidence for a Phantom-Divide-Crossing Dark Energy"
09:20 - 10:20
Room: Main Hall
Contributions

09:20 Changbom Park - "No Evidence for a Phantom-Divide-Crossing Dark Energy"
10:20 Coffee break
Coffee break
10:20 - 10:50
10:50 Invited: Takahiro Matsubara - "Tensor Fields and Integrated Perturbation Theory"
Takahiro Matsubara - "Tensor Fields and Integrated Perturbation Theory"
10:50 - 11:50
Room: Main Hall
Contributions

10:50 Takahiko Matsubara "Tensor Fields and Integrated Perturbation Theory"
11:50 Invited: Nils A. Nilsson - "Testing spacetime symmetries with current and future gravitational-wave observations"
Nils A. Nilsson - "Testing spacetime symmetries with current and future gravitational-wave observations"
11:50 - 12:30
Room: Main Hall
Contributions

11:50 Nils A. Nilsson - "Testing spacetime symmetries with current and future gravitational-wave observations"
12:30 Lunch break
Lunch break
12:30 - 14:00
14:00 Invited: Teruaki Suyama - "Graviton Floor"
Teruaki Suyama - "Graviton Floor"
14:00 - 15:00
Room: Main Hall
Contributions

14:00 Graviton Floor
15:00 Invited: Donghui Jeong - "PowerFull: Modeling wide-angle relativistic power spectrum with the TAM formalism"
Donghui Jeong - "PowerFull: Modeling wide-angle relativistic power spectrum with the TAM formalism"
15:00 - 16:00
Room: Main Hall
Contributions

15:00 Donghui Jeong - "PowerFull: Modeling wide-angle relativistic power spectrum with the TAM formalism"
16:00 Coffee break
Coffee break
16:00 - 16:30
16:30 Contributed: Leonid Gurvits - "Multi-messaging prelude: precursors of gravitational wave emitters at the milliarcsecond scale"
Leonid Gurvits - "Multi-messaging prelude: precursors of gravitational wave emitters at the milliarcsecond scale"
16:30 - 17:10
Contributions

16:30 Leonid Gurvits - "Multi-messaging prelude: precursors of gravitational wave emitters at the milliarcsecond scale"
17:30 Social: Conference reception
Conference reception
17:30 - 19:30
Tuesday, 28 April 2026
09:00 Invited: Mairi Sakellariadou - "Cosmological and High Energy Physics implications from gravitational-wave background searches in LIGO-Virgo-KAGRA's O1-O4a runs"
Mairi Sakellariadou - "Cosmological and High Energy Physics implications from gravitational-wave background searches in LIGO-Virgo-KAGRA's O1-O4a runs"
09:00 - 10:00
Room: Main Hall
Contributions

09:00 Mairi Sakellariadou - "Cosmological and High Energy Physics implications from gravitational-wave background searches in LIGO-Virgo-KAGRA's O1-O4a runs"
10:00 Coffee break
Coffee break
10:00 - 10:30
10:30 Invited: Ana Achucarro - "Ultra-slow-turn inflation"
Ana Achucarro - "Ultra-slow-turn inflation"
10:30 - 11:30
Room: Main Hall
Contributions

10:30 Ana Achucarro - "Ultra-slow-turn inflation"
11:30 Invited: Jaume Garriga - "Primordial black holes and baby universes from ultra-slow roll"
Jaume Garriga - "Primordial black holes and baby universes from ultra-slow roll"
11:30 - 12:30
Room: Main Hall
Contributions

11:30 Primordial black holes and baby universes from ultra-slow roll
12:30 Lunch break
Lunch break
12:30 - 14:00
14:00 Contributed: Bum-Hoon Lee - "Cosmic Gravitational Microwave Backgrounds and the Einstein-dilaton-Gauss-Bonnet Cosmology"
Bum-Hoon Lee - "Cosmic Gravitational Microwave Backgrounds and the Einstein-dilaton-Gauss-Bonnet Cosmology"
14:00 - 14:40
Room: Main Hall
Contributions

14:00 Bum-Hoon Lee - "Cosmic Gravitational Microwave Backgrounds and the Einstein-dilaton-Gauss-Bonnet Cosmology"
Contributed: Vicharit Yingcharoenrat - "Large n-point functions in resonant inflation"
Vicharit Yingcharoenrat - "Large n-point functions in resonant inflation"
14:00 - 14:40
Room: Room B
Contributions

14:00 Vicharit Yingcharoenrat - "Large n-point functions in resonant inflation"
14:40 Contributed: Daiki Saito, Yi-Zen Chu
Daiki Saito, Yi-Zen Chu
14:40 - 15:20
Room: Room B
Contributions

14:40 Daiki Saito - "Long-wavelength perturbations around an anisotropic universe"

15:00 Yi-Zen Chu - "What Constitutes A Gravitational Wave In An Expanding Universe?"
Contributed: Swagat Saurav Mishra, Toshiki Takadera
Swagat Saurav Mishra, Toshiki Takadera
14:40 - 15:20
Room: Main Hall
Contributions

14:40 Swagat Saurav Mishra - "Dynamical Dark Energy from the Braneworld"

15:00 Toshiki Takadera - "Halos and voids in the EFT of dark energy"
15:20 Coffee break
Coffee break
15:20 - 15:50
15:50 Contributed: Perseas Christodoulidis, S Mahesh Chandran
Perseas Christodoulidis, S Mahesh Chandran
15:50 - 16:30
Room: Room B
Contributions

15:50 Perseas Christodoulidis - "Dissipative EFT of inflation"

16:10 Mahesh Chandran - "Inflation-collapse duality breaking in a Planck-scale sensitive cosmological quantum simulator"
Contributed: Zahra Davari
Zahra Davari
15:50 - 16:10
Room: Main Hall
Contributions

15:50 Zahra Davari - "From Tomographic Alcock–Paczyński Measurements to Physical Quintessence Models"
16:10 Discussion/Networking
Discussion/Networking
16:10 - 17:10
Room: Room B

16:30 Discussion/Networking
Discussion/Networking
16:30 - 17:10
Room: Main Hall
Wednesday, 29 April 2026
09:00 Invited: Misao Sasaki - "Primordial Black Holes and Induced Gravitational Waves"
Misao Sasaki - "Primordial Black Holes and Induced Gravitational Waves"
09:00 - 10:00
Room: Main Hall
Contributions

09:00 Primordial Black Holes and Induced Gravitational Waves
10:00 Coffee break
Coffee break
10:00 - 10:30
10:30 Invited: Sabir Ramazanov - "Cosmic domain walls: theory and lattice observations"
Sabir Ramazanov - "Cosmic domain walls: theory and lattice observations"
10:30 - 11:30
Room: Main Hall
Contributions

10:30 Sabir Ramazanov - "Cosmic domain walls: theory and lattice observations"
11:30 Invited: Gianmassimo Tasinato - " Gravitational Waves Probes of Fundamental Physics: Theory Perspective"
Gianmassimo Tasinato - " Gravitational Waves Probes of Fundamental Physics: Theory Perspective"
11:30 - 12:30
Room: Main Hall
Contributions

11:30 Gianmassimo Tasinato - "Gravitational Waves Probes of Fundamental Physics: Theory Perspective"
12:30 Group photo (Location: Main Hall)

12:30 - 12:40
Room: Main Hall

12:40 Lunch break
Lunch break
12:40 - 14:00
14:00 Contributed: Ido Ben-Dayan - "Suppressed Intrinsic Curvature Gravity"
Ido Ben-Dayan - "Suppressed Intrinsic Curvature Gravity"
14:00 - 14:40
Room: Main Hall
Contributions

14:00 Ido Ben-Dayan - "Suppressed Intrinsic Curvature Gravity"
Contributed: Konstantinos F. Dialektopoulos - "Primordial black holes as cosmic expansion accelerators"
Konstantinos F. Dialektopoulos - "Primordial black holes as cosmic expansion accelerators"
14:00 - 14:40
Room: Room B
Contributions

14:00 Konstantinos F. Dialektopoulos - "Primordial black holes as cosmic expansion accelerators"
14:40 Contributed: Javier Moreno, Eve Dones
Javier Moreno, Eve Dones
14:40 - 15:20
Room: Main Hall
Contributions

14:40 Javier Moreno - "Regular black holes in pure AdS"

15:00 Eve Dones - "Radiation-reaction effects at 3PN order in scalar-tensor theories"
Contributed: Pritha Bari, Tomotaka Kuroda
Pritha Bari, Tomotaka Kuroda
14:40 - 15:20
Room: Room B
Contributions

14:40 Pritha Bari - "Signatures of Primordial Gravitational Waves on the Large-Scale Structure of the Universe"

15:00 Tomotaka Kuroda - "Insights for non-Markovianity in the stochastic formalism"
15:20 Coffee Break
Coffee Break
15:20 - 15:50
15:50 Contributed: Rinku Maji, Michiru Uwabo-Niibo
Rinku Maji, Michiru Uwabo-Niibo
15:50 - 16:30
Room: Main Hall
Contributions

15:50 Rinku Maji - "Cosmological Implications of Unification: Topological Structures and Gravitational Waves"

16:10 Michiru Uwabo-Niibo - "Cosmic Neutrino Background Detection with Tritium"
Contributed: Valentina Danieli, Dong Ha Lee
Valentina Danieli, Dong Ha Lee
15:50 - 16:30
Room: Room B
Contributions

15:50 Valentina Danieli - "Dark graviton sensing with magnetically levitated superconductors"

16:10 Dong Ha Lee - "A QCD vacuum motivated model of dynamical dark energy"
16:30 Free discussion
Free discussion
16:30 - 17:10

17:30 Social: Banquet (on the third floor of the workshop venue)
Banquet (on the third floor of the workshop venue)
17:30 - 19:00
Thursday, 30 April 2026

09:00 Invited: Viatcheslav Mukhanov - "Regularized Quantum Instantons"
Viatcheslav Mukhanov - "Regularized Quantum Instantons"
09:00 - 10:00
Room: Main Hall

10:00 Coffee break
Coffee break
10:00 - 10:30
10:30 Invited: Seong Chan Park - "Superheavy Dark Matter: theory and experiment"
Seong Chan Park - "Superheavy Dark Matter: theory and experiment"
10:30 - 11:30
Room: Main Hall
Contributions

10:30 Seong Chan Park - "Superheavy Dark Matter: theory and experiment"
11:30 Invited: Alexander Vikman - "Stable Quantum Ghost"
Alexander Vikman - "Stable Quantum Ghost"
11:30 - 12:30
Room: Main Hall
Contributions

11:30 Alexander Vikman - "Stable Quantum Ghost"
12:30 Lunch break
Lunch break
12:30 - 14:00
14:00 Contributed: Jibril Ben Achour - "Jet launching and acceleration of charged particles in the Kerr magnetosphere: An electrogeodesic approach"
Jibril Ben Achour - "Jet launching and acceleration of charged particles in the Kerr magnetosphere: An electrogeodesic approach"
14:00 - 14:40
Room: Main Hall
Contributions

14:00 Jibril Ben Achour - "Jet launching and acceleration of charged particles in the Kerr magnetosphere: An electrogeodesic approach"
Contributed: Pavel Petrov, Che-Yu Chen
Pavel Petrov, Che-Yu Chen
14:00 - 14:40
Room: Room B
Contributions

14:00 Pavel Petrov - "Nonsingular Cosmologies in Horndeski Gravity"

14:20 Che-Yu Chen - "Light in the darkness: Inner shadow to probe quantum gravity"
14:40 Contributed: Mang Hei Gordon Lee, Calvin Chen
Mang Hei Gordon Lee, Calvin Chen
14:40 - 15:20
Room: Room B
Contributions

14:40 Mang Hei Gordon Lee - "Propagator positivity for cosmological correlators"

15:00 Calvin Chen - "Holomorphic structure of massive scalar fields in (A)dS_2"
Contributed: Stephen Angus, Masroor C. Pookkillath
Stephen Angus, Masroor C. Pookkillath
14:40 - 15:20
Room: Main Hall
Contributions

14:40 Stephen Angus - "Clustering dynamics in O(D,D) string cosmology from double field theory"

15:00 Masroor C. Pookkillath - "Effective field theory of coupled dark energy and dark matter"
15:20 Coffee break
Coffee break
15:20 - 15:50
15:50 Contributed: Hugo Roussille - "A new integrable parametrization for deformations to the Kerr photon ring"
Hugo Roussille - "A new integrable parametrization for deformations to the Kerr photon ring"
15:50 - 16:30
Room: Main Hall
Contributions

15:50 Hugo Roussille - "A new integrable parametrization for deformations to the Kerr photon ring"
Contributed: Minxi He, Joakim Flinckman, Zi-Yu Tang, Yusuke Manita
Minxi He, Joakim Flinckman, Zi-Yu Tang, Yusuke Manita
15:50 - 17:10
Room: Room B
Contributions

15:50 Minxi He - "Unitarity of single scalar field with non-minimal coupling"

16:10 Joakim Flinckman - "Gravity beyond a single metric: Ghost-free interactions of spin-2 fields"

16:30 Zi-Yu Tang - "A photon cloud induced from an axion cloud"

16:50 Yusuke Manita - "Agnostic mode decomposition and nonlinear resonance in black hole ringdowns"
Friday, 1 May 2026

09:00 Invited: Fawad Hassan - "Ghost-free theories of multiple spin 2 fields: bimetric and multimetric interactions"
Fawad Hassan - "Ghost-free theories of multiple spin 2 fields: bimetric and multimetric interactions"
09:00 - 10:00
Room: Main Hall

10:00 Coffee break
Coffee break
10:00 - 10:30
10:30 Invited: Antonio De Felice - "Dark Energy in Light of Current Observations and Modified Gravity"
Antonio De Felice - "Dark Energy in Light of Current Observations and Modified Gravity"
10:30 - 11:30
Room: Main Hall
Contributions

10:30 Antonio De Felice - "Dark Energy in Light of Current Observations and Modified Gravity"
11:30 Invited: Tsutomu Kobayashi - "Spinoptics in the presence of axion-like particles in curved spacetime"
Tsutomu Kobayashi - "Spinoptics in the presence of axion-like particles in curved spacetime"
11:30 - 12:30
Room: Main Hall
Contributions

11:30 Tsutomu Kobayashi - "Spinoptics in the presence of axion-like particles in curved spacetime"
12:30 Lunch break
Lunch break
12:30 - 14:00

14:00 Invited: Matteo Magi - "Poincaré Gauge Gravity with Extra Massive Spin-2 in Cosmology"
Matteo Magi - "Poincaré Gauge Gravity with Extra Massive Spin-2 in Cosmology"
14:00 - 14:40

14:40 Coffee break
Coffee break
14:40 - 15:10
15:10 Invited: Shinji Mukohyama - "Emergent time and big-bang"
Shinji Mukohyama - "Emergent time and big-bang"
15:10 - 16:10
Room: Main Hall
Contributions

15:10 Shinji Mukohyama - "Emergent time and big-bang"
16:10 Social: Closing discussion/farewell
Closing discussion/farewell
16:10 - 17:00
Room: Main Hall

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