AI 中文总结
该研究在宇称破缺对称远平行引力框架下，通过恒速暴胀产生宽带手征原初引力波，确定了符合观测约束的参数区域，其信号有望被LiteBIRD、LISA-Taiji等探测，为检验暴胀期宇称破缺引力提供了新途径。
AI 中文摘要
我们研究宇称破缺对称远平行引力扩展理论中恒速暴胀期间产生的原初引力波（GWs）。宇称破缺相互作用不改变背景演化和线性标量扰动，却在张量 sector 中诱导速度双折射，导致两个圆偏振态之一发生快子放大，产生从宇宙微波背景（CMB）到干涉仪尺度的强蓝移、近乎完全手征的张量谱。我们确定了符合当前CMB约束的可行恒速参数区域，以及同时满足CMB B模式测量和LIGO-Virgo-KAGRA（LVK）O1-O4a随机GW背景约束的最大耦合强度。该模型预测的CMB B模式谱可被LiteBIRD探测，增强的高频信号有望被LISA-Taiji网络和LVK O5运行探测，还会产生非零的TB和EB关联。这些结果凸显了结合CMB与多波段GW观测以检验暴胀期间宇称破缺引力的潜力。
英文摘要
We investigate primordial gravitational waves (GWs) generated during constant-roll inflation in a parity-violating extension of symmetric teleparallel gravity. The parity-violating interactions leave the background evolution and linear scalar perturbations unchanged, while inducing velocity birefringence in the tensor sector. Consequently, one of the two circular polarization states undergoes tachyonic amplification, producing a strongly blue and nearly fully chiral tensor spectrum from the cosmic microwave background (CMB) to interferometer scales. We identify viable constant-roll parameter regions consistent with current CMB constraints and determine the largest coupling strength compatible with both CMB B-mode measurements and the LIGO-Virgo-KAGRA (LVK) O1--O4a bound on the stochastic GW background. The predicted CMB B-mode spectra may be detectable by LiteBIRD, while the enhanced high-frequency signal could be accessible to the LISA--Taiji network and LVK O5 run. The model also predicts nonvanishing TB and EB correlations. These results highlight the potential of combining CMB and multi-band GW observations to test parity-violating gravity during inflation.
Comments8 pages, 4 figures
