高能暂现源 · 每日文献综述

Inflationary phase transitions can generate a stochastic gravitational-wave background that probes primordial physics. We study the detectability and parameter reconstruction of such a signal with a space-based gravitational-wave detector. Using a Taiji-like mission as a benchmark, we construct a realistic data-analysis framework that includes instrumental noise, astrophysical foregrounds and backgrounds, and the <inline-formula><mml:math><mml:mrow><mml:mi>A</mml:mi></mml:mrow></mml:math></inline-formula>, <inline-formula><mml:math><mml:mi>E</mml:mi></mml:math></inline-formula>, and <inline-formula><mml:math><mml:mi>T</mml:mi></mml:math></inline-formula> time-delay interferometry channels. The target signal is described in a minimal, model-independent form and analyzed using both Fisher-matrix forecasts and Bayesian inference with nested sampling. We quantify detection significance and parameter-recovery thresholds, showing that, while detection is achievable at moderate signal-to-noise ratios, stronger signals provide more reliable parameter reconstruction. These results offer a realistic assessment of the capability of future space-based missions to probe inflationary phase transitions through stochastic gravitational radiation.