Conveners
Session 1
- Kim Wontae (Sogang University)
Session 1
- Park Jeong-Hyuck (Sogang University)
Session 1
- Scopel Stefano (Sogang University)
This presentation introduces a new project aimed at detecting dark matter at the Yemi Microgravity Observatory, called D-μGICK. Located 1,008 meters underground (118 meters below sea level) in the Yemi Lab in Jeongseon, Gangwon Province, this project uses a superconducting gravimeter to explore the possible existence of Compact Dark Objects (CDOs) within the Earth. To enhance the efficiency of...
We investigate the homogeneous and anisotropic evolution of spacetime driven by perfect fluid with shear viscosity. We consider the simplest form of the equation of state wherein the pressure and the shear stress are proportional to the energy density individually. We consider single off-diagonal component of shear viscosity, and find that the evolution of spacetime becomes Bianchi type-I. A...
I will talk about 3-sphere partition functions of various 3d N = 2 holographic SCFTs arising from the N stack of M2-branes in the ’t Hooft limit. I will first explain how to evaluate the free energy F = −log Z analytically at the planar level via saddle point approximation, tracking the first subleading corrections in the large ’t Hooft coupling λ expansion. Subsequently, I present the...
We demonstrate how the ultralight dark matter (ULDM) model can resolve the final parsec problem of supermassive black holes. Following this, we derive the characteristic scales for physical quantities observed in galaxies, including mass, size, acceleration, and angular momentum, within the framework of the ULDM model, both with and without self-interaction. Additionally, we discuss the...
Background electromagnetic fields modify the Maxwell theory into nonlinear electrodynamics. Highly magnetized neutron stars and cosmic magnetic fields in the early universe receive QED loop corrections. Photons have multi-refringence and the polarization vectors carry information about the electromagnetic fields. The Maxwell theory in curved spacetimes, such as black holes and early universe,...
