Spacetime instability due to quantum gravity by Iberê Kuntz, Roldão da Rocha

“…Without a mechanism to stop these modes from growing, the universe would go through a gravitational collapse. For Minkowski background, we propose a solution by choosing an integration contour in Fourier space that does not enclose the problematic modes, thus preventing them from showing up in the effective theory. …”
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Holographic thermalization in noncommutative geometry by Xiao-Xiong Zeng, Xian-Ming Liu, Wen-Biao Liu

“…Gravitational collapse of a shell of dust in noncommutative geometry is probed by the renormalized geodesic length, which is dual to probe the thermalization by the two-point correlation function in the dual conformal field theory. …”
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Scalar field black holes by S. Carneiro, J. C. Fabris

“…Abstract With a suitable decomposition of its energy-momentum tensor into pressureless matter and a vacuum type term, we investigate the spherical gravitational collapse of a minimally coupled, self-interacting scalar field, showing that it collapses to a singularity. …”
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Exact black hole formation in three dimensions by Wei Xu

“…Firstly we obtain an exact time-dependent spherically symmetric solution describing the gravitational collapse to a scalar black hole at the infinite time, i.e. in the static limit. …”
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The origin of the cosmological constant in unimodular gravity by Enrique Álvarez, Jesús Anero, Irene Sánchez-Ruiz

“…In this work we try to flesh this out by studying in some detail a couple of examples, one from cosmology and the other from gravitational collapse.…”
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Shadow and stability of quantum-corrected black holes by Jinsong Yang, Cong Zhang, Yongge Ma

“…Abstract Recently the quantum Oppenheimer–Snyder gravitational collapse model has been proposed in loop quantum gravity, providing quantum-corrected Schwarzschild spacetimes as the exterior of the collapsing dust ball. …”
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The Unruh Vacuum and the “In-Vacuum” in Reissner-Nordström Spacetime by Roberto Balbinot, Alessandro Fabbri

“…The Unruh vacuum is widely used as a quantum state to describe black hole evaporation since, near the horizon, it reproduces the physical state of a quantum field, the so-called “in-vacuum”, in the case where a black hole is formed by gravitational collapse. We examine the relation between these two quantum states in the background spacetime of a Reissner–Nordström black hole (both extremal and not), highlighting the similarities and striking differences.…”
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Halo abundances and shear in void models by Alonso, D, García-Bellido, J, Haugbølle, T, Knebe, A

“…We study the non-linear gravitational collapse of dark matter into halos through numerical N-body simulations of Lemaître–Tolman–Bondi void models. …”

Moduli-Induced Vacuum Destabilisation by Conlon, J, Pedro, F

“…Regrettably neutron stars cannot destabilise realistic Planck coupled moduli, which would require objects many orders of magnitude denser. However gravitational collapse, either in matter-dominated universes or in black hole formation, inevitably leads to a destabilisation of the compact volume causing a super-inflationary expansion of the extra dimensions.…”

Fundamental limit on angular measurements and rotations from quantum mechanics and general relativity by Xavier Calmet, Stephen D.H. Hsu

“…We show that the precision of an angular measurement or rotation (e.g., on the orientation of a qubit or spin state) is limited by fundamental constraints arising from quantum mechanics and general relativity (gravitational collapse). The limiting precision is r−1 in Planck units, where r is the physical extent of the (possibly macroscopic) device used to manipulate the spin state. …”
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Critical collapse for the Starobinsky R 2 model by Yolbeiker Rodríguez Baez

“…Abstract We study gravitational collapse for the Starobinsky R 2 model, a particular example of an f(r) theory, in a spherically symmetric spacetime. …”
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Quantum radiation of a collapsing shell in three-dimensional AdS spacetime revisited by Hwajin Eom, Wontae Kim

“…Abstract In three-dimensional AdS space, we consider the gravitational collapse of dust shell and then investigate the quantum radiation from the collapsing shell by employing the functional Schrödinger formalism. …”
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On higher dimensional self-similar axion–dilaton solutions by Ehsan Hatefi, Eleonora Vanzan

“…Abstract We show that solutions of the self-similar gravitational collapse in the Einstein-axion–dilaton system exist in higher-dimensional spacetimes. …”
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Towards the Rosetta Stone of planet formation by Schmidt T.O.B., Roell T., Raetz St., Pribulla T., Moualla M., Marka C., Kramm U., Hohle M., Ginski Ch., Fiedler S., Eisenbeiss T., Berndt A., Adam Ch., Mugrauer M., Errmann R., Neuhäuser R., Maciejewski G., Seeliger M., Spaleniak I., Tetzlaff N., Trepl L.

“…They would give strong constraints on several aspects of planet formation, e.g. time-scales (planet formation would then be possible within 10 Myrs), the radius of the planet could indicate whether planets form by gravitational collapse (being larger when young) or accretion growth (being smaller when young). …”
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The Negative Energy in Generalized Vaidya Spacetime by Vitalii Vertogradov

“…We consider several models where we have the naked singularity as a result of the gravitational collapse. In these models we investigate the geodesics for particles with negative energy when the II type of the matter field satisfies the equation of the state <inline-formula><math display="inline"><semantics><mrow><mi>P</mi><mo>=</mo><mi>α</mi><mi>ρ</mi></mrow></semantics></math></inline-formula> (<inline-formula><math display="inline"><semantics><mrow><mi>α</mi><mo>∈</mo><mo>[</mo><mn>0</mn><mspace width="0.166667em"></mspace><mo>,</mo><mn>1</mn><mo>]</mo></mrow></semantics></math></inline-formula>).…”
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Complexity of scalar collapse in anti-de Sitter spacetime by Andrew R. Frey, Michael P. Grehan, Manu Srivastava

“…Abstract We calculate the volume and action forms of holographic complexity for the gravitational collapse of scalar field matter in asymptotically anti-de Sitter spacetime, using numerical methods to reproduce the geometry responding to the oscillating field over multiple crossing times. …”
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Classical Limit for Dirac Fermions with Modified Action in the Presence of a Black Hole by Meir Lewkowicz, Mikhail Zubkov

“…We consider the dynamics of gravitational collapse. It appears that the Einstein equations admit a solution identical to that of ordinary general relativity. …”
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Effective Field Theory of Loop Quantum Cosmology by Martin Bojowald

“…Moreover, the infrared scale is running during gravitational collapse, when regions in which homogeneity remains approximately valid shrink to increasingly smaller co-moving sizes. …”
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The strongest magnetic fields in the universe: How strong can they become? by Rudolf A. Treumann, Wolfgang eBaumjohann, André eBalogh

“…These are produced by gravitational collapse of massive magnetised objects. Clearly, fields in the massive progenitor are energetically limited by the available energy which can be fed into the generation of currents and magnetic fields. …”
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A self-gravitating system composed of baryonic and dark matter analysed from the post-Newtonian Boltzmann equations by Gilberto M. Kremer, Kamel Ourabah

“…It is shown that both effects give rise to smaller Jeans masses, in comparison with the standard Jeans criterion, meaning that a smaller mass is needed to begin the gravitational collapse. Taking advantage of that, we confront the model with the observational stability of Bok globules, and show that the model correctly reproduces the data.…”
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