Curvature and dynamical spacetimes: can we peer into the quantum regime?
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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Curvature and dynamical spacetimes : can we peer into the quantum regime? / Cardoso, Vitor; Hilditch, David; Marouda, Krinio; Natario, Jose; Sperhake, Ulrich.
I: Classical and Quantum Gravity, Bind 40, Nr. 6, 065008, 16.03.2023.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Curvature and dynamical spacetimes
T2 - can we peer into the quantum regime?
AU - Cardoso, Vitor
AU - Hilditch, David
AU - Marouda, Krinio
AU - Natario, Jose
AU - Sperhake, Ulrich
PY - 2023/3/16
Y1 - 2023/3/16
N2 - Stationary compact astrophysical objects such as black holes and neutron stars behave as classical systems from the gravitational point of view. Their (observable) curvature is everywhere "small'. Here we investigate whether mergers of such objects, or other strongly dynamical spacetimes such as collapsing configurations, may probe the strong-curvature regime of general relativity. Our results indicate that dynamical black hole spacetimes always result in a modest increase similar to 3 in the Kretschmann scalar, relative to the stationary state. In contrast, we find that the Kretschmann scalar can dynamically increase by orders of magnitude, during the gravitational collapse of scalar fields, and that the (normalized) peak curvature does not correspond to that of the critical solution. Nevertheless, without fine tuning of initial data, this increase lies far below that needed to render quantum-gravity corrections important.
AB - Stationary compact astrophysical objects such as black holes and neutron stars behave as classical systems from the gravitational point of view. Their (observable) curvature is everywhere "small'. Here we investigate whether mergers of such objects, or other strongly dynamical spacetimes such as collapsing configurations, may probe the strong-curvature regime of general relativity. Our results indicate that dynamical black hole spacetimes always result in a modest increase similar to 3 in the Kretschmann scalar, relative to the stationary state. In contrast, we find that the Kretschmann scalar can dynamically increase by orders of magnitude, during the gravitational collapse of scalar fields, and that the (normalized) peak curvature does not correspond to that of the critical solution. Nevertheless, without fine tuning of initial data, this increase lies far below that needed to render quantum-gravity corrections important.
KW - curvature in dynamical spacetimes
KW - gravitational collapse
KW - 1-loop corrections to GR
KW - EXTREME GRAVITY TESTS
KW - GRAVITATIONAL-WAVES
KW - NUMERICAL RELATIVITY
KW - HORIZON FINDER
KW - COLLAPSE
U2 - 10.1088/1361-6382/acb9cd
DO - 10.1088/1361-6382/acb9cd
M3 - Journal article
VL - 40
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
SN - 0264-9381
IS - 6
M1 - 065008
ER -
ID: 340973656