We study the properties of gravitational wave(GW)signals produced by first-order phase transitions during the inflation era.We show that the power spectrum of a GW oscillates with its wave number.This signal can be ob...We study the properties of gravitational wave(GW)signals produced by first-order phase transitions during the inflation era.We show that the power spectrum of a GW oscillates with its wave number.This signal can be observed directly by future terrestrial and spatial GW detectors and through the B-mode spectrum in the CMB.This oscillatory feature of the GW is generic for any approximately instantaneous sources occurring during inflation and is distinct from the GW from phase transitions after inflation.The details of the GW spectrum contain information about the scale of the phase transition and the later evolution of the universe.展开更多
基金supported by NSFC(11975134)the National Key Research and Development Program of China(2017YFA0402204)+4 种基金the Tsinghua University Initiative Scientific Research Programsupported in part by the National Science Foundation(NSF PHY-1748958)by the Heising-Simons Foundationsupported by the DOE(DE-SC0013642)supported in part by the Swedish Research Council(2015-05333,2018-03803)。
文摘We study the properties of gravitational wave(GW)signals produced by first-order phase transitions during the inflation era.We show that the power spectrum of a GW oscillates with its wave number.This signal can be observed directly by future terrestrial and spatial GW detectors and through the B-mode spectrum in the CMB.This oscillatory feature of the GW is generic for any approximately instantaneous sources occurring during inflation and is distinct from the GW from phase transitions after inflation.The details of the GW spectrum contain information about the scale of the phase transition and the later evolution of the universe.
