About

Following previous workshops on Oshima Island, Japan in 2022, in Prague and Castle Třešť, Czech Republic in 2022, in Kyukamura Shikotsuko on Hokkaido, Japan in 2023, , in FZU, Prague, Czech Republic in 2023 and in Kyukamura Irago, Japan in 2024 we meet again in Prague. This workshop is based on the MOU between CEICO, FZU and CTPU IBS. The purpose of this workshop is to exchange ideas, to promote collaboration, and to discuss recent developments in Cosmology, Gravity, and Particle Physics.

Programme



PRELIMINARY SCHEDULE

SCHEDULE Monday
07/04/2025
Tuesday
08/04/2025
Wednesday
09/04/2025
Thursday
10/04/2025
Friday
11/04/2025
Saturday
12/04/2025
09:30-10:00 ARRIVAL and REGISTRATION, Openning 9:55 Francesco Di Filippo
Towards a non-singular paradigm for black hole physics
Free Discussions, and Collaboration time Justin Feng
Primordial Black Holes, Charge, and Dark Matter: Rethinking Evaporation Limits
Paola Delgado
Testing gravitational wave polarizations with LISA


Collaboration time
10:00-10:40 Masahide Yamaguchi
Cosmological collider from particle physics viewpoint
Sante Carloni
Adiabatic radial perturbations of relativistic stars: new solutions to an old problem
Coffee Break
Discussion of Ongoing Projects
Eugeny Babichev
Cherenkov vs. ghosts
10:40-11:10 Coffee Break Coffee Break Coffee Break Coffee Break
11:10-11:50 Cédric Deffayet
Ghosts without runaway instabilities
Tomislav Prokopec
Semiclassical gravity and beyond
Iman Gorji
Dark matter from inflationary quantum fluctuations
Iggy Sawicki
Causality and Stability from Acoustic Geometry
11:50-12:20 Rodrigo Calderón
Dark Energy after DESI DR2
Dražen Glavan
One-loop correction to primordial tensor power spectrum during radiation era
Zi-Yu Tang
A photon cloud induced from an axion cloud
Borna Salehian
Positivity bounds on electromagnetic properties of media
12:20-12:50 Qianhang Ding
How a local structure impacts our understanding on fundamental physics


Fumiya Sano
On IR/UV divergence of inflationary decoherence
Jessica López-Sánchez
Scaling relations and tidal disruption in spin 𝑠 ultralight dark matter models
Aaron Held
Ghostly interactions in classical field theory: From scalar models to black-hole binaries
12:50-14:15 LUNCH LUNCH LUNCH LUNCH LUNCH
14:15-14:45 Yuhang Zhu
A Match Made in Heaven: Linking Observables in Inflationary Cosmology


Alexandre Pombo
Virial identities across the spacetime


Tilek Zhumabek
Model independent dark matter properties from cosmic growth


Atabak Jalali
Quantum Ghost


CLOSING
14:45-15:25 Karol Kampf
Pion amplitudes from the theory perspective


Joffrey Le Grix De La Salle
Ghosts in higher order theories of Gravity: From GR to Gauss-Bonnet Gravity


Tomotaka Kuroda
Stochastic formalism in the perturbative regime


Coffee Break
Discussion of Ongoing Projects
Coffee Break
Discussion of Ongoing Projects
15:25-15:55 Coffee Break
Collaboration Time
Coffee Break
Discussion of Ongoing Projects
Nils Albin Nilsson
Symmetry-based generalisation of the alpha-attractor model
Siyao Li
Oscillon decay accelerated by external scalar field resonance


15:55-16:25 Hui-Yu Zhu
Survival of the Fittest: Testing Superradiance Termination with Simulated Binary Black Hole Statistics


Theodoros Nakas
Black holes with primary scalar hair


Michiru Uwabo-Niibo
Peaks sphericity of non-Gaussian random fields


Pritha Bari
Gravitational waves induced by scalar-tensor mixing


16:25-16:55 Han Gil Choi
Gravitational wave lensing as a probe of small-scale structures in our universe


Breno Giacchini
Black holes and other exact solutions in six-derivative gravity



Discussion of Ongoing Projects
Leonardo Trombetta
Large black-hole scalar charges induced by cosmology in Horndeski theories


16:55-17:25 Collaboration Time Discussion of Ongoing Projects Discussion of Ongoing Projects David Vokrouhlický
Stealth black holes in Aether Scalar Tensor theory



* to be confirmed


PRELIMINARY LIST OF PARTICIPANTS

PARTICIPANT AFFILIATION
Eugeny Babichev Laboratoire de Physique des 2 Infinis Irène Joliot-Curie – IJCLab, Orsay, France
Pritha BariCTPU-CGA, Institute for Basic Science, Daejeon, Korea
Matyáš Bílek Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, Prague
Rodrigo Calderon CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Sante Carloni Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, Prague
Kabir Chakravarti CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Han Gil Choi CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Øyvind Christiansen CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Valentina Danieli CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Cédric Deffayet Laboratoire de Physique de l’Ecole Normale Supérieure, Paris, France
Paola Delgado CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Francesco Di Filippo Institute for Theoretical Physics, Goethe University Frankfurt, Germany
Qianhang Ding CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Despoina Farakou CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Justin Feng CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Breno Giacchini Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, Prague
Dražen Glavan CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Aaron Held Laboratoire de Physique de l’Ecole Normale Supérieure, Paris, France
Atabak Jalali CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Mohammad Ali Gorji CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Karol Kampf Institute of Particle & Nuclear Physics, Faculty of Mathematics and Physics, Charles University, Prague
Igor Khavkine Charles University, Prague and Institute of Mathematics, Czech Academy of Sciences, Prague
Tomotaka Kuroda CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Joffrey Le Grix De La Salle CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Siyao Li CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Jessica López-Sánchez CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Erick Munive-Villa CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Theodoros Nakas CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Nils Albin Nilsson CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Alexandre Pombo CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Tomislav Prokopec Department of Physics and Astronomy, Utrecht University, Netherlands
Borna Salehian Department of Physics, ETH Zürich, Switzerland
Fumiya Sano Department of Physics, Tokyo Institute of Science, Japan
Ignacy Sawicki CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Martin Schnabl CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Robert Švarc Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, Prague
Otakar Svitek Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, Prague
Tayebeh Tahamtan Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, Prague
Vendelín Tajčovský Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, Prague
Zi-Yu Tang CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Georg Trenkler CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Leonardo Trombetta CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Federico Urban CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Michiru Uwabo-Niibo Ochanomizu University, Tokyo, Japan and CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Alexander Vikman CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
David Vokrouhlický CEICO, Institute of Physics of the Czech Academy of Sciences, Prague
Masahide Yamaguchi Department of Physics, Tokyo Institute of Science, Japan and CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Hui-Yu Zhu CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Yuhang Zhu CTPU-CGA, Institute for Basic Science, Daejeon, Korea
Tilek Zhumabek CTPU-CGA, Institute for Basic Science, Daejeon, Korea

* to be confirmed

Venue and Accommodation


SOCIAL EVENTS

The workshop dinner is TBA. In addition to the closest cafeteria Jídelna Slovanka, which we reserved for 1 pm on every workshop day except Wednesday, within walking distance from the Institute of Physics one can find a few restaurants, bistros and cafes. The closest options are

Registration:

the workshop is by invitation only.

ORGANISING COMMITTEE

SPONSORS

CEICO
FZU
AVCR
IBS