Results 51 to 60 of about 681 (164)
Generic naked singularities in Vaidya spacetimes
Classical and Quantum Gravity, 2022 Abstract We investigate the occurrence of naked singularities, local and global, in the incoming Vaidya spacetimes with zero initial mass. While it is well-known that these spacetimes admit locally and globally naked singularities, we demonstrate that globally naked singularities are significantly more common than is stressed in the ...
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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
Systems Research and Behavioral Science, EarlyView.ABSTRACT Access to forests, farming land and the Citarum river is limited in Tarumajaya; furthermore, many do not own their own housing and are dependent on the public and private landowners in the area. The region of Tarumajaya faces significant challenges in access to crucial resources such as forests, farming land and the Citarum river, leading to a
Rudolf Wirawan +4 more
wiley +1 more source
From amplitudes to analytic wavefunctions
Journal of High Energy PhysicsThe field-theoretic wavefunction has received renewed attention with the goal of better understanding observables at the boundary of de Sitter spacetime and studying the interior of Minkowski or general FLRW spacetime.
Mang Hei Gordon Lee
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Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model
Systems Research and Behavioral Science, EarlyView.ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley +1 more source
Rigorous reconstruction of gluon propagator in the presence of complex singularities
SciPost Physics Proceedings, 2022 It has been suggested that the Landau-gauge gluon propagator has complex singularities, which invalidates the K\"all\'en-Lehmann spectral representation.
Yui Hayashi, Kei-Ichi Kondo
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The Modern Language Journal, EarlyView.Abstract This duoethnographic study explores how two nonnative returnee English teachers in China negotiate their professional identities through chronotopically layered transnational literacy experiences. Drawing on the concept of the chronotope—the interconnectedness of time, space, and personhood—the analysis identifies three chronotopic ...
Shan Chen, Luping Sun
wiley +1 more source
Winding Strings in Singular Spacetimes
, 2005 Evolution of winding strings in spacetimes with cycles whose proper lengths depend on time is examined. It was established earlier that extended objects wrapping the shrinking dimension in compactified Milne spacetime enjoy classically nonsingular evolution. Extensions of this observation to other spacetimes are discussed.
Pawłowski, M. +2 more
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Quantum Singularities in Conformally Static Spacetimes [PDF]
, 2014 After a brief review of the standard definition and analysis of classical singularities in general relativistic spacetimes, and of quantum singularities in static spacetimes with timelike classical singularities, an extension of quantum singularities to conformally static spacetimes is summarized and applied to two test cases.
Konkowski, Deborah A. +1 more
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Noûs, EarlyView.Abstract The present paper presents a new (formal) theory of presence according to which, roughly, to be present at a place is to have a delegate located at that place. One crucial feature of the theory is that something can be present at a place without thereby being located there.
Claudio Calosi
wiley +1 more source