MG14 - Talk detail |
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Participant |
Esposito, Giampiero | |||||||
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Institution |
INFN - Via Cintia - Naples - - Italy | |||||||
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Session |
AT2 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Is there a quantum gravity effect on the cosmic microwave background power spectrum? | |||||
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Abstract |
An assessment is made of recent attempts to evaluate how quantum gravity may affect the anisotropy spectrum of the cosmic microwave background. A perturbative scheme for the solution of the Wheeler-DeWitt equation has been found to allow for enhancement of power at large scales, whereas the alternative predicts a suppression of power at large scales. Both effects are corrections which, although conceptually interesting, turn out to be too small to be detected. Another scheme relies upon a Born-Oppenheimer analysis. By using a perturbative approach to the nonlinear ordinary differential equation obeyed by the two-point function for scalar fluctuations, a new family of power spectra has been obtained and studied. |
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