Paper references: Will Handley. Primordial power spectra for curved inflating universes. arXiv, 1907.08524, Jul 2019. W. J. Handley, A. N. Lasenby, and M. P. Hobson. Novel quantum initial conditions for inflation. PRD, 94(2):024041, Jul 2016. W. J. Handley, A. N. Lasenby, and M. P. Hobson. The Runge-Kutta-Wentzel-Kramers-Brillouin Method. arXiv, 1612.02288, Dec 2016. F. Agocs, W. Handley, A. Lasenby, and M. Hobson. An efficient method for solving highly oscillatory ordinary differential equations. arXiv, 1906.01421, May 2019. Jamie Bamber and Will Handley. Beyond the Runge-Kutta-Wentzel-Kramers-Brillouin method. arXiv, 1907.11638, Jul 2019. W. I. J. Haddadin and W. J. Handley. Rapid numerical solutions for the Mukhanov-Sazaki equati...