The Value of Singularities

Abstract

We point out that spacetime singularities play a useful role in gravitational theories by eliminating unphysical solutions. In particular, we argue that any modification of general relativity which is completely nonsingular cannot have a stable ground state. This argument applies both to classical extensions of general relativity, and to candidate quantum theories of gravity.

5 pages, no figures; a few clarifying comments added

References in corpus (1)

• Weaving a classical geometry with quantum threads

Cited by in corpus (63)

• Quantum Gravity: a Progress Report
• Quantum geometry and the Schwarzschild singularity
• Microscopic Formulation of Black Holes in String Theory
• Gauge Theory and the Excision of Repulson Singularities
• Stress Tensors and Casimir Energies in the AdS/CFT Correspondence
• Regular black holes in quadratic gravity
• Geodesically complete black holes
• Not quite a black hole
• Area spectrum of the Schwarzschild black hole
• On the instability of 3d null singularities
• Who's Afraid of Naked Singularities?
• Curvature invariants, geodesics and the strength of singularities in Bianchi-I loop quantum cosmology
• Pathologies in Asymptotically Lifshitz Spacetimes
• Opening the Pandora's box at the core of black holes
• What is a singular black hole beyond General Relativity?
• A New Perspective on DGP Gravity
• Contrasting features of anisotropic loop quantum cosmologies: the role of spatial curvature
• Lemaitre-Tolman-Bondi collapse from the perspective of loop quantum gravity
• Nonsingular Black Holes and Degrees of Freedom in Quantum Gravity
• Cosmological Spacetimes from Negative Tension Brane Backgrounds
• On the fate of singularities and horizons in higher derivative gravity
• Towards a Non-singular Paradigm of Black Hole Physics
• Hawking radiation of nonsingular black holes in two dimensions
• Does the Tachyon Matter?
• Excluding Black Hole Firewalls with Extreme Cosmic Censorship
• On the stability of naked singularities
• Horizons cannot save the Landscape
• Galileon Hairs of Dyson Spheres, Vainshtein's Coiffure and Hirsute Bubbles
• Singularities In Scalar-Tensor Cosmologies
• The Backreaction of Anti-M2 Branes on a Warped Stenzel Space
• Spacetime Singularities and Cosmic Censorship Conjecture: A Review with Some Thoughts
• Non-singular black-holes on the brane
• Reduced phase space formalism for spherically symmetric geometry with a massive dust shell
• Hyperbolic compactification of M-theory and de Sitter quantum gravity
• Quantum improved charged black holes
• Antibranes don't go black
• Gravity a la Born-Infeld
• Analysis of the Fisher solution
• Singularities and closed time-like curves in type IIB 1/2 BPS geometries
• Supersymmetry, holonomy and Kundt spacetimes
• Quantum singularities in the BTZ spacetime
• Geometric inequivalence of metric and Palatini formulations of General Relativity
• Geodesically complete black holes in Lorentz-violating gravity
• Naked singularities in low energy, effective string theory
• Charged Particle Production Rate from Cosmic Censorship in Dilaton Black Hole Spacetimes
• Two Wave Functions and dS/CFT on S^1 x S^2
• Non-perturbative materialization of ghosts
• Sectional Curvature Bounds in Gravity: Regularisation of the Schwarzschild Singularity
• Holographic entanglement and causal information in coherent states
• On Black Hole Thermodynamics, Singularity, and Gravitational Entropy
• Scalar field spacetimes and the AdS/CFT conjecture
• On small black holes, KK monopoles and solitonic 5-branes
• Stability of the non-extremal enhancon solution I: perturbation equations
• Particles and Strings in Degenerate Metric Spaces
• Regular black hole from a confined spin connection in Poincare gauge gravity
• Quantum complexity and bulk timelike singularities
• A new nonlinear electrodynamics and electrically charged regular black holes
• Quantum Schwarzschild-(A)dS Black Holes: Unitarity and Singularity Resolution
• Populating the swampland: the case of U(1)^496 and E_8 x U(1)^248
• The Heterotic Enhancon
• Spacetime Singularities in (2+1)-Dimensional Quantum Gravity
• Phases of Braneworlds, Spinning D3-branes and Strongly-Coupled Gauge Theories
• A simple holographic scenario for gapped quenches