Topological censorship and chronology protection

Abstract

Over the past two decades, substantial efforts have been made to understand the way in which physics enforces the ordinary topology and causal structure that we observe, from subnuclear to cosmological scales. We review the status of topological censorship and the topology of event horizons; chronology protection in classical and semiclassical gravity; and related progress in establishing quantum energy inequalities.

Dedicated to Rafael Sorkin, whose tutoring and friendship from third grade on is responsible for one of us (JF) having spent his adult life in physics and whose work has inspired both of us. In v.2, some references are updated, and references are added to early work on 2+1 spacetimes and to work on event-horizon topology

References in corpus (65)

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• Traversable wormholes with arbitrarily small energy condition violations
• The warp drive: hyper-fast travel within general relativity
• The State of the Dark Energy Equation of State
• Morris-Thorne wormholes with a cosmological constant
• Does backreaction enforce the averaged null energy condition in semiclassical gravity?
• Constraining the Topology of the Universe
• Topological Censorship and Higher Genus Black Holes
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• Topological Censorship
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Cited by in corpus (13)

• Achronal averaged null energy condition
• Visualizing Interstellar's Wormhole
• Cylindrical Systems in General Relativity
• Potentially observable cylindrical wormholes without exotic matter in general relativity
• Generic warp drives violate the null energy condition
• Quantum simulation of traversable wormhole spacetimes in a dc-SQUID array
• Wormhole geometries in fourth-order conformal Weyl gravity
• On Toroidal Horizons in Binary Black Hole Inspirals
• Transmission of low-energy scalar waves through a traversable wormhole
• Non-commutative Geometry from Perturbative Quantum Gravity in de Sitter spacetime
• Relating chronology protection and unitarity through holography
• Chronology protection and the stringy exclusion principle
• Life on a closed timelike curve