17-19 February 2020
Kavli IPMU, Kashiwa, Japan
Asia/Tokyo timezone

Dates: February 17 - 19, 2020

Venue: Lecture Hall, Kavli IPMU, Kashiwa, Japan


Because gravity is an attractive force, the expansion speed of the Universe should be decreasing. However, observational data accumulated over the years strongly support that the present Universe is in the phase of the accelerated expansion and there was also another phase of the accelerated expansion in the very early Universe. The physical echanism that makes the Universe undergo the ccelerated expansion is not known yet. Some “repulsive force” is necessary. The purpose of this innovative area is to clarify the origin of the accelerated expansion. In order to achieve this goal, it is necessary to investigate the interplay between the repulsive force causing the accelerated expansion and the attractive force sourced by dark matter which triggers the formation of the cosmic structures such as the galaxies and clusters of galaxies. In this innovative area, researchers from different fields join together and form nine sub-groups: inflation in the early Universe (A01), decelerated expansion by dark matter (A02), accelerated expansion by dark energy in the present Universe (A03), cosmic microwave background (B01), galaxy imaging (B02), galaxy spectroscopy (B03), direct measurement of the cosmic expansion (B04), ultimate data analysis (D01), and ultimate theory of the Universe (C01). Not only collaborations within each individual sub-group but also collaborations among the different sub-groups are essential to obtain scientific achievements we desire.

This symposium consists of reports of scientific results by representatives and members of each sub-group as well as researchers selected for public research.


Invited speakers:

Chihway Chang (KICP, U. Chicago)
Kyle Dawson (Utah) 
Konstantinos Dimopoulos (Lancaster)
Elisa Ferreira (MPA)
Nicoletta Krachmalnicoff (SISSA)
Tom Melia (Kavli IPMU: TBC)
Marius Millea (BCCP, UC Berkeley)
Alexander Westphal (DESY)

Code of Conduct:
It is the policy of the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) that all members and visitors will conduct themselves in a professional manner that is welcoming and free from any form of discrimination, harassment, or retaliation. Members and visitors will avoid any inappropriate actions or statements based on individual characteristics such as age, race, ethnicity, gender, sexual orientation, marital status, nationality, or political affiliation. Disruptive or harassing behavior of any kind will not be tolerated. Harassment includes but is not limited to inappropriate or intimidating behavior and language, unwelcome jokes or comments, unwanted touching or attention, offensive images, photography without permission, and stalking. Members and visitors will treat each other with respect to create a collegial, inclusive, and professional environment at the Kavli IPMU.



Masashi Hazumi (KEK/Kavli IPMU)
Eiichiro Komatsu (MPA/Kavli IPMU)
Ryu Makiya (Kavli IPMU)
Satoshi Miyazaki (NAOJ)
Hitoshi Murayama (Kavli IPMU/Berkeley)
Hirosi Ooguri (Caltech/Kavli IPMU)
Naoshi Sugiyama (Nagoya/Kavli IPMU)
Tomomi Sunayama (Kavli IPMU)
Masahiro Takada (Kavli IPMU)
Fuminobu Takahashi (Tohoku U.)
Tomonori Usuda (NAOJ)

Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU),
the University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa City, Chiba 277-8583, Japan



Kavli IPMU, Kashiwa, Japan
Lecture Hall
Kashiwa, Japan