The upper bound on the tensor-to-scalar ratio consistent with quantum gravity

Lina Wu,Qing Gao,Yungui Gong,Yiding Jia,Tianjun Li

Figure 3. The potential V/V0 and its first derivative $V^{\prime} /{V}_{0}$ with the parameters λi = ( − 3.6188 × 10−2, − 10.0437 × 10−3, − 9.8543 × 10−3, 32.1351 × 10−2, − 35.5515 × 10−2) . The vertical dashed lines correspond to the horizon crossing point φ* = 0, the inflection point φinfl = 0.516 MPl and the end of inflation φe = 1.313 MPl.