Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-11-24
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
17 pages, based on talk presented at the Ninth Marcel Grossmann Meeting, Rome, July, 2000; v2: typo corrected
Scientific paper
A very brief review is given of the current state of research in quantum
gravity. Over the past fifteen years, two approaches have emerged as the most
promising paths to a quantum theory of gravity: string theory and quantum
geometry. I will discuss the main achievements and open problems of each of
these approaches, and compare their strengths and weaknesses.
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