Description
Chair: Hiroshi Itoyama (NITEP, Osaka Metropolitan University)
In this talk, I will describe a quantum field theoretic phenomenon called the gauge ``slingshot" effect. The effect occurs when a source, such as a magnetic monopole or a quark, crosses the boundary between the Coulomb and confining phases. The corresponding gauge field of the source, either electric or magnetic, gets confined into a flux tube stretching in the form of a string (cosmic or a...
In this study, we propose a novel method for distinguishing spin of ultralight dark matter (ULDM) through the ULDM search with interferometric gravitational wave detectors. ULDM, presenting potential spin states of 0, 1, and 2, induces distinctive signatures in GW signals. We found that the finite-time light-traveling effect dominates for spin-0 and spin-1 ULDM, resulting in unique overlap...
The string theory suggests the possible existence of scalar fields with tiny masses called string axions. Such a scalar field grows around a rotating astrophysical black holes by extracting rotation energy of that black hole due to the mechanism called the superradiant instability and forms an axion cloud. The self-interaction of the scalar field becomes important at the final stage of that...
