Strings, loops and others: a critical survey of the present approaches to quantum gravity

1998/03/05 by Carlo Rovelli, Rovelli, Carlo · 6 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Noncommutative and Quantum Gravity Theories #gr-qc #hep-th

paper · pdf · doi:10.48550/arxiv.gr-qc/9803024

Plenary lecture on quantum gravity at the GR15 conference, Pune, India

openalex publication_date 1998/03/05 · arxiv created 1998/04/07 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

I review the present theoretical attempts to understand the quantum properties of spacetime. In particular, I illustrate the main achievements and the main difficulties in: string theory, loop quantum gravity, discrete quantum gravity (Regge calculus, dynamical triangulations and simplicial models), Euclidean quantum gravity, perturbative quantum gravity, quantum field theory on curved spacetime, noncommutative geometry, null surfaces, topological quantum field theories and spin foam models. I also briefly review several recent advances in understanding black hole entropy and attempt a critical discussion of our present understanding of quantum spacetime.

Cited by

• Unified Framework for Geodesic Dynamics with Conservative, Dissipative, and GUP Effects
• Renormalizable Quantum Gravity in Low Energy without Violating Unitarity
• Stark Energy Shifts due to Quantum Gravity in RGUP Algebra
• Entropy and temperature from black-hole/near-horizon-CFT duality
• RGUP Corrections to Scalar and Fermionic Fields
• The Internal and External Problems of String Theory: A Philosophical View

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