Phase transitions in the early Universe give rise to effective masses for massless fields in the symmetry-broken phase. We use the lattice simulations to investigate the impact of a spectator scalar field with mass generation on the dynamics of first-order phase transitions and the generation of gravitational waves. In addition to the well-known friction effects, we identify a novel effect...
The tensions between cosmological parameter measurements from the early-universe and the late-universe datasets offer an exciting opportunity to explore new physics, if not accounted for unknown systematics. Apart from the well-known Hubble tension, a tension up to ∼ 4.9σ in the cosmic dipole has also been reported. While the cosmic dipole is mainly induced by the observer’s kinetic motion, an...
The Galactic foreground noise presents a major challenge for space-based gravitational wave detection. Gravitational waves from the vast population of double white dwarfs overlap and interfere, producing an indistinguishable foreground component. This contamination complicates the search for other gravitational wave sources and reduces their signal-to-noise ratios. Since the foreground is...
Clouds of ultralight bosons can form around spinning black holes through superradiance. In this talk, we shall discuss the dynamical evolution of such clouds in binary black hole systems. Focusing on comparable mass binaries, we demonstrate that the cloud can resonantly transfer between the two black holes and eventually form a common envelope during the late inspiral phase. We also study the...
Matched filtering is a common method for detecting gravitational waves. However, the computational costs of searching large template banks limit the efficiency of classical algorithms when searching for massive black hole binary (MBHB) systems. In this work, a quantum matched filtering algorithm based on Grover's algorithm is applied to the MBHB signals. It is demonstrated that the quantum...
