A new dimensional-regularization procedure extracts complete finite parts of inflationary loop integrals, yielding a regulator-independent one-loop tensor power spectrum in slow-roll inflation with no late-time divergence.
Quantum Gravity: A Brief History of Ideas and Some Prospects
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We present a bird's-eye survey on the development of fundamental ideas of quantum gravity, placing emphasis on perturbative approaches, string theory, loop quantum gravity, and black hole thermodynamics. The early ideas at the dawn of quantum gravity as well as the possible observations of quantum gravitational effects in the foreseeable future are also briefly discussed.
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Finite parts of inflationary loops
A new dimensional-regularization procedure extracts complete finite parts of inflationary loop integrals, yielding a regulator-independent one-loop tensor power spectrum in slow-roll inflation with no late-time divergence.