Zobrazeno 1 - 10
of 403
pro vyhledávání: '"Zong, Kuan"'
The spectrum and dynamical instability, as well as the transient effect of the tensor perturbation for the so-called Maeda-Dadhich black hole, a type of Kaluza-Klein black hole, in Einstein-Gauss-Bonnet gravity have been investigated in framework of
Externí odkaz:
http://arxiv.org/abs/2407.03907
We calculate the tensor bispectrum mediated by an excited scalar field during inflation and find that the bispectrum peaks in the squeezed configuration, which is different from that of gravitational waves induced by enhanced curvature perturbations
Externí odkaz:
http://arxiv.org/abs/2403.04617
Autor:
Ruan, Wen-Hong, Guo, Zong-Kuan
Publikováno v:
Phys. Rev. D 109, 123031 (2024)
Coalescing massive black hole binaries (MBHBs) are one of primary sources for space-based gravitational wave (GW) observations. The mergers of these binaries are expected to give rise to detectable electromagnetic (EM) emissions with a narrow time wi
Externí odkaz:
http://arxiv.org/abs/2402.16282
Autor:
Zeng, Zhen-Min, Guo, Zong-Kuan
We investigate the first-order phase transition catalyzed by primordial black holes~(PBHs) in the early Universe. We find that super-horizon curvature perturbations generated in this scenario lead to the production of gravitational waves when the sca
Externí odkaz:
http://arxiv.org/abs/2402.09310
Publikováno v:
Eur. Phys. J. C 84, 394 (2024)
In the 2030s, space-based gravitational-wave (GW) detectors will exhibit unprecedented sensitivity in the millihertz frequency band, greatly expanding the potential for testing theories of gravity compared to ground-based GW detectors. Inspired by ef
Externí odkaz:
http://arxiv.org/abs/2401.03669
Ultra-slow-roll~(USR) inflation predicts an exponential amplification of scalar perturbations at small scales, which leads to a stochastic gravitational wave background~(SGWB) through the coupling of the scalar and tensor modes at the second-order ex
Externí odkaz:
http://arxiv.org/abs/2310.20564
Publikováno v:
Universe 2023, 9(9), 407
In the 2030s, a new era of gravitational-wave (GW) observations will dawn as multiple space-based GW detectors, such as the Laser Interferometer Space Antenna, Taiji and TianQin, open the millihertz window for GW astronomy. These detectors are poised
Externí odkaz:
http://arxiv.org/abs/2307.14844
Publikováno v:
Phys. Rev. D 108, 123509 (2023)
We study the inflationary model with a spectator scalar field $\chi$ coupled to both the inflaton and Ricci scalar. The interaction between the $\chi$ field and the gravity, denoted by $\xi R\chi^2$, can trigger the tachyonic instability of certain m
Externí odkaz:
http://arxiv.org/abs/2307.03120
Autor:
Cai, Rong-Gen, Guo, Zong-Kuan, Hu, Bin, Liu, Chang, Lu, Youjun, Ni, Wei-Tou, Ruan, Wen-Hong, Seto, Naoki, Wang, Gang, Wu, Yue-Liang
The space-based laser interferometers, LISA, Taiji and TianQin, are targeting to observe milliHz gravitational waves (GWs) in the 2030s. The joint observations from multiple space-based detectors yield significant advantages. In this work, we recap t
Externí odkaz:
http://arxiv.org/abs/2305.04551
Publikováno v:
Phys. Rev. D 108, 063005(2023)
We investigate spherical domain walls~(DWs) nucleated via quantum tunneling in multifield inflationary models and curvature perturbations induced by the inhomogeneous distribution of those DWs. We consider the case that the Euclidean action $S_{E}$ o
Externí odkaz:
http://arxiv.org/abs/2301.07230