Results 61 to 70 of about 1,803 (203)
Covariant singularities: A brief review [PDF]
, 2022 The Hawking–Penrose theorem is not covariant under field redefinitions. Should the invariance under such transformations be a true principle in nature, spacetime singu- larities become dubious objects.
Kamenshchik, Alexander +2 more
core +1 more source
Taming singularities and chaos in conformal gravity
European Physical Journal C: Particles and FieldsWe hereby address the cosmological singularity problem in a general gravitational theory invariant under Weyl conformal transformations. In particular, we focus on the Bianchi IX spacetime and we show that both the initial (big bang) and final (big ...
Jiale Gu, Leonardo Modesto, Cosimo Bambi
doaj +1 more source
Do black holes create polyamory?
Journal of High Energy Physics, 2018 Of course not, but if one believes that information cannot be destroyed in a theory of quantum gravity, then we run into apparent contradictions with quantum theory when we consider evaporating black holes.
Andrzej Grudka +5 more
doaj +1 more source
Quantum Black Holes and (Re)Solution of the Singularity
Universe, 2021 Classical general relativity predicts the occurrence of spacetime singularities under very general conditions. Starting from the idea that the spacetime geometry must be described by suitable states in the complete quantum theory of matter and gravity ...
Roberto Casadio
doaj +1 more source
Aggregation and the Structure of Value
Noûs, EarlyView.ABSTRACT Roughly, the view I call “Additivism” sums up value across time and people. Given some standard assumptions, I show that Additivism follows from two principles. The first says that how lives align in time cannot, in itself, matter. The second says, roughly, that a world cannot be better unless it is better within some period or another.
Weng Kin San
wiley +1 more source
Perturbative spacetimes from Yang-Mills theory
Journal of High Energy Physics, 2017 The double copy relates scattering amplitudes in gauge and gravity theories. In this paper, we expand the scope of the double copy to construct spacetime metrics through a systematic perturbative expansion.
Andrés Luna +6 more
doaj +1 more source
Noûs, EarlyView.ABSTRACT In several articles, McCall and Lowe have claimed that endurantism and perdurantism are “equivalent.” From this, they conclude that there is no fact of the matter as to whether we live in an endurantist world or in a perdurantist world. In this paper, I use the notion of Morita equivalence to show in which precise sense, McCall and Lowe's ...
Joshua Babic
wiley +1 more source
ARE CLASSICALLY SINGULAR SPACETIMES QUANTUM MECHANICALLY SINGULAR AS WELL? [PDF]
The Tenth Marcel Grossmann Meeting, 2006 Are the classical singularities of general relativistic spacetimes, normally defined by the incompleteness of classical particle paths, still singular if quantum mechanical particles are used instead? This is the question we will attempt to answer for particles obeying the quantum mechanical wave equations for scalar, null vector and spinor particles ...
Konkowski, D. A. +2 more
openaire +2 more sources
The Quantum Mechanical Path Integral: Toward a Realistic Interpretation [PDF]
, 2007 In this paper, I explore the feasibility of a realistic interpretation of the quantum mechanical path integral - that is, an interpretation according to which the particle actually follows the paths that contribute to the integral.
Sharlow, Mark
core
From disformal electrodynamics to exotic spacetime singularities
, 2023 We study different types of spacetime singularities which emerge in the context of disformal electrodynamics. The latter is characterized by transformations of the background metric which preserve regular (non-null) solutions of Maxwell equations in ...
Ottoni, José Eloy +3 more
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