Description
2-minute sparkler presentations of the posters which will be presented at the dedicated Poster session in the afternoon.
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Bao-Jun Cai (Fudan University)06/07/2026, 11:55Poster
Understanding the equation of state (EOS) of dense matter inside neutron stars remains an important topic in modern nuclear physics and astrophysics. Recent multimessenger observations, especially gravitational-wave measurements from binary neutron-star mergers, together with X-ray timing and radio pulsar observations, have opened new opportunities for probing matter at supranuclear densities....
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Chong-Bin Chen (Nanchang University)06/07/2026, 11:57Poster
A mechanism for generating anisotropic enhancements of the curvature perturbation through a vector field is proposed. This suggests that statistical anisotropy in primordial black hole (PBH) formation and stochastic gravitational-wave backgrounds (SGWB) may be inevitable if inflation undergoes an anisotropic inflationary phase. Our findings offer a novel approach to probe vector hair during...
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Pascal Gutjahr (Adelaide University)06/07/2026, 12:00Poster
We present IceCube measurements of the atmospheric muon energy spectrum from the sub-TeV to the PeV scale, obtained by unfolding energy-sensitive observables for two complementary event classes. Stopping muons contained within the in-ice detector provide sensitivity in the few-hundred-GeV to 10 TeV range, while through-going muons extend the measurement to higher energies where the prompt...
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Songmin Ha (Korea university)06/07/2026, 12:02Poster
We revisit the role of boundary terms in Einstein–Hilbert gravity from the perspective of an initial value variational principle. Instead of imposing boundary conditions at both initial and final times, we employ the Schwinger–Keldysh–Galley (SKG) framework, which naturally implements an initial value formulation by doubling the degrees of freedom and imposing connecting conditions between...
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Masataka Ishikawa (the University of Tokyo)06/07/2026, 12:05Poster
We study perturbative unitarity bounds on the field-space curvature in de Sitter spacetime, using the momentum-space entanglement approach recently proposed by Duaso Pueyo, Goodhew, McCulloch, and Pajer. As an illustration, we perform a perturbative computation of the purity in two-scalar models and compare the resulting unitarity bounds with those obtained via a flat space approximation. In...
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Ayushi Kaushik (SHIV NADAR INSTITUTION OF EMINECE DEEMED TO BE UNIVERSITY, GREATER NOIDA, INDIA)06/07/2026, 12:07Poster
We discuss the effect of multiple mediators influencing the scattering of astrophysical neutrinos at the ultra-high energies — 100 TeV and beyond — against relic neutrinos from the Cosmic neutrino background, demonstrating unique features in the resulting spectral shape as detected at neutrino telescopes like IceCube. We specifically discuss the effect of superposition of scattering amplitudes...
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Zhuochao LI (the Chinese University of Hong Kong)06/07/2026, 12:10Poster
Abstract: Dark energy and dark matter constitute the dominant components of the universe's energy density. Nevertheless, we know very little about these dark sectors. Recent observations from the Dark Energy Spectroscopic Instrument (DESI) suggest that dark energy may be dynamical. It is natural to ask: Does dark energy interact with dark matter? In this project, we investigate and constrain...
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Wentao Liu (Lanzhou University)06/07/2026, 12:12Poster
We investigate quasinormal modes (QNMs) of scalar, electromagnetic, and axial gravitational perturbations in slowly rotating Kalb–Ramond (KR) black holes, where an antisymmetric tensor field induces spontaneous Lorentz symmetry breaking. Working consistently to first order in the dimensionless spin parameter, we derive the corresponding master equations and compute the QNM spectrum using both...
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Yu-Xiao Liu (Lanzhou University)06/07/2026, 12:15Poster
We establish a unified parameterized framework for analyzing the polarization modes of gravitational waves in some general gravitational theories that satisfy the following conditions: (1) Spacetime is four-dimensional; (2) The theories satisfy the principle of least action; (3) The theories are generally covariant; (4) The action describing a free particle is $\int ds$. We find that the...
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Yusuke Makita (Nagoya University)06/07/2026, 12:17Poster
We present a method to construct static regular solutions describing wormholes that connect multiple asymptotic regions, supported by a phantom scalar field. The solutions are static and axially symmetric, and are constructed using the gravitational soliton formalism, in which the equations of motion reduce to the Laplace equations on a two-dimensional sheet. However, the presence of multiple...
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Myeong-Gu Park (Kyungpook National University)06/07/2026, 12:20Poster
Magnetic fields around rotating black holes can produce diverse astrophysical phenomena. We first discuss the particle acceleration by magnetic Penrose process. Penrose process is a novel way to extract the rotational energy of the black holes, but it requires a special condition, generally not expected in typical astrophysical situations. However, magnetic Penrose process can extract the...
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Dr Qun-Ying Xie (Lanzhou University)06/07/2026, 12:22Poster
The discovery of gravitational waves as a major breakthrough in 21st-century physics has provided humanity with a novel observational tool to explore the mysteries of the Universe. However, in actual detection, gravitational wave detectors are often affected by various types of noise interference, particularly transient and non-Gaussian ‘glitch’ noise. These glitches not only obscure genuine...
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Daisuke Yoshida (Nagoya University)06/07/2026, 12:25Poster
We formulate a local geometric criterion for weak cosmic censorship in black hole overcharging/overspinning thought experiments.
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Matter satisfying the null energy condition generically focuses the null generators of the initial Killing horizon and turns a horizon cross section into a closed trapped surface.
Thus, any candidate final spacetime that cannot accommodate this surface is ruled... -
Yu-Peng Zhang (Lanzhou University)06/07/2026, 12:27Poster
Discrepancies between observations of galactic rotation curves and theoretical predictions suggest the existence of dark matter. Although numerous experiments have failed to detect weakly interacting massive particle (WIMP) dark matter, dark matter exhibits gravitational interactions with celestial bodies, and its high-density accumulation in strong gravitational systems such as black holes...
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