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تسجيل مستخدم جديدComputation of the Power Spectrum in Chaotic $1/4 lambda phi^4$ Inflation
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The phase-integral approximation devised by Froman and Froman, is used for computing cosmological perturbations in the quartic chaotic inflationary model. The phase-integral formulas for the scalar power spectrum are explicitly obtained up to fifth order of the phase-integral approximation. As in previous reports [1-3], we point out that the accuracy of the phase-integral approximation compares favorably with the numerical results and those obtained using the slow-roll and uniform approximation methods.
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