GW-CMB 2026

18 May 2026, 09:00 → 19 May 2026, 20:40 Asia/Taipei

National Central University

GW-CMB2026 will be held in Taiwan in 2026, bringing together leading researchers in gravitational-wave (GW) physics, cosmic microwave background (CMB) cosmology, and early-Universe science.
The central objective of GW-CMB2026 is to strengthen the scientific bridge between the gravitational-wave and cosmology communities at a pivotal moment in experimental progress. Ground-based GW observatories such as LIGO, Virgo, and KAGRA continue to refine their sensitivity, while next-generation detectors are under active development. In parallel, precision CMB observations are entering a new era of sensitivity to primordial tensor modes and fundamental physics.
The workshop will focus on the following key themes:

• Current and next-generation gravitational-wave detectors
• Searches for the stochastic gravitational-wave background
• Primordial gravitational waves and early-Universe physics
• Quantum-noise-limited interferometry and advanced calibration
• CMB polarization and tensor constraints
• Joint likelihood frameworks and multi-probe cosmology
• Cross-correlation strategies between GW and CMB datasets

GW-CMB2026 is designed not only as a scientific meeting but also as a strategic forum for future international collaboration. By encouraging direct dialogue between GW experimentalists, cosmologists, and theorists, the conference aims to identify unified analysis approaches and coordinated observational strategies for the coming decade.
Taiwan hosts a dynamic and rapidly growing research community in gravitational-wave and cosmology science. National Central University (NCU), the Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), and the Leung Center for Cosmology and Particle Astrophysics (LeCosPA) form the core foundation of GW–CMB research in Taiwan.
NCU contributes to gravitational-wave instrumentation and detector development, ASIAA plays a leading role in observational cosmology and CMB experiments, and LeCosPA provides theoretical expertise in early-Universe physics and fundamental cosmology.
This foundation is further strengthened by a broad network of universities and research institutes across Taiwan contributing to detector technology, cosmological data analysis, theoretical modeling, and multi-messenger astrophysics.
By hosting GW-CMB2026 in Taiwan, we aim to strengthen international collaboration and position Taiwan as a natural bridge between gravitational-wave experimentation and cosmological exploration.

Local organizing committee:

• Yuki Inoue (Chair),  National Central University
• Teppei Okumura (Co-Chair), ASIAA 
• Masashi Hazumi, National Central University
• Keiichi Umetsu, ASIAA
• Yi-Kuan Chiang, ASIAA
• Chia-Hsien Shen, NTU/LeCosPa

Sponsors

This workshop is sponsored by the Center for High Energy and High Field Physics (CHiP) and is supported by the Physical Society of Taiwan (TPS) and 中華民國重力學會(GSROC).

 

Code of Conduct

We follow the Code of Conduct of the Physical Society of Taiwan (TPS).

 

Campus map

Monday 18 May

09:00 → 09:30 Registration

09:30 → 09:45 Opening remark

Speaker: Teppei Okumura

09:45 → 10:15 Session 1-1 (Chair: Yuki Inoue): Summary Talk

Convener: Prof. Chia-Hsien Shen

10:15 → 10:45 Session 1-2 (Chair:Yuki Inoue): Black Hole Mergers as the Fastest Scramblers on the Photon Ring

Convener: Giataganas Dimitrios

10:45 → 11:15 Session 1-3 (Chair: Yuki Inoue): Gravitational Sommerfeld Effects

Convener: Chih-Hao Chang

11:15 → 11:45 Session 1-4 (Chair: Yuki Inoue): Primordial Features: Probing Affleck-Dine Baryogenesis with LiteBIRD

Convener: Yi-Peng Wu (Institute of Physics, Academia Sinica)

11:45 → 12:45 Lunch

12:45 → 13:15 Session 2-1 (Chair:Teppei Okumura): Summary talk: Experimental approach to observe wide-band Stochastic Gravitational Wave Background

Convener: Yuki Inoue (National Central University)

GW-CMB2026_talk.pdf

13:15 → 13:45 Session2-2 (Chair: Teppei Okumura): Scientific results from the first part of LIGO's fourth gravitational wave observing run and its future plans(Daiki Tanabe)

Convener: Daiki Tanabe (Academia Sinica)

13:45 → 14:15 Session 2-3 (Chair: Teppei Okumura): CHRONOS: Key Technologies and Science Roadmap for Sub-Hz GW Detection

Convener: Mario Juvenal III Onglao (National Institute of Physics, College of Science, UP Diliman)

14:15 → 14:45 Session 2-4 (Chair: Teppei Okumura): Search for Primordial Gravitational Waves with CMB Observations

Convener: Masashi Hazumi (National Central University)

14:45 → 15:00 Coffee break

15:00 → 16:00 CHiP Special Seminar (Chair: Yuki Inoue): LiteBIRD (Hirokazu Ishino)

Convener: Hirokazu Ishino

16:00 → 16:30 Poster session: Lightning talk (Chair: Yuki Inoue)

16:30 → 18:00 Poster session: Poster Session

Tuesday 19 May

10:00 → 10:30 Session 3: New Probes of the Hubble Constant using GW Dark Sirens and Clustering redshift (Chair: Keiichi Umetsu): Summary Talk: Clustering Redshifts for H0 ​with SNe Ia and GW Dark Sirens

Convener: Yi-Kuan Chiang

10:30 → 11:00 Session 3: New Probes of the Hubble Constant using GW Dark Sirens and Clustering redshift (Chair: Keiichi Umetsu): Contributed talk

Convener: Kin-Wang Ng (Institute of Physics, Academia Sinica)

11:00 → 11:30 Session 3: New Probes of the Hubble Constant using GW Dark Sirens and Clustering redshift (Chair: Keiichi Umetsu): Contributed talk

11:30 → 12:00 Session 3: New Probes of the Hubble Constant using GW Dark Sirens and Clustering redshift (Chair: Keiichi Umetsu): Contributed talk

Convener: Teppei Okumura

12:00 → 13:00 Lunch

13:00 → 13:30 Session4: Large-scale Structure as a Probe of Gravitational Wave (Chair Masashi Hazumi): Summary talk

Convener: Teppei Okumura

13:30 → 14:00 Session4: Large-scale Structure as a Probe of Gravitational Wave (Chair Masashi Hazumi): Probing Ultralight Dark Matter with Gravitational Wave Detectors

Convener: Ippei Obata

14:00 → 14:30 Session4: Large-scale Structure as a Probe of Gravitational Wave (Chair Masashi Hazumi): Imprints of gravitational-wave polarizations on projected tidal tensor in three dimensions

Convener: Yusuke Mikura

14:30 → 15:00 Session4: Large-scale Structure as a Probe of Gravitational Wave (Chair Masashi Hazumi)

Convener: Yuki Inoue (National Central University)

15:00 → 15:30 Coffee Break

15:30 → 16:00 Galaxy Cluster as Laboratories of Nonlinear Structure Formation and Dark Sector Physics(Chair: Yi-Kuan Chiang): Summary talk

Convener: Keiichi Umetsu

16:00 → 16:30 Galaxy Cluster as Laboratories of Nonlinear Structure Formation and Dark Sector Physics(Chair: Yi-Kuan Chiang): Contributed talk

Convener: I-Non Chiu

16:30 → 17:00 Galaxy Cluster as Laboratories of Nonlinear Structure Formation and Dark Sector Physics(Chair: Yi-Kuan Chiang): Simulation-based Inference for cluster cosmology & GW analysis

Convener: Sut-Ieng Tam

17:00 → 17:30 Galaxy Cluster as Laboratories of Nonlinear Structure Formation and Dark Sector Physics(Chair: Yi-Kuan Chiang): Contributed talk

Convener: Shouvik Roy Choudhury

17:30 → 17:40 Closed remark