Geodesics in supersymmetric microstate geometries

Eperon, Felicity C.

doi:10.1088/1361-6382/aa7bfe

Cited by 27 publications

(25 citation statements)

References 44 publications

(128 reference statements)

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“…(4.11). Moreover, using equation (2.45) for ξ, 20) we see that the first term of the denominator cancels the term in the parenthesis. Thus, finally we get…”

Section: Angular Momenta Of the Perturbation In The Inner Regionmentioning

confidence: 86%

Quasinormal modes of supersymmetric microstate geometries from the D1-D5 CFT

Chakrabarty

Ghosh

Virmani

2019

J. High Energ. Phys.

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We revisit the study of the probe scalar quasinormal modes of a class of three-charge supersymmetric microstate geometries. We compute the real and imaginary parts of the quasinormal modes and show that in the parameter range when the geometries have large AdS region, the spectrum is precisely reproduced from a D1-D5 orbifold CFT analysis. The spectrum includes the slow decaying modes pointed out by Eperon, Reall, and Santos. We analyse in detail the nature of the quasinormal modes by studying the scalar wavefunction. We show that these modes correspond to slow leakage of excitation from AdS throat to infinity.

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“…(4.11). Moreover, using equation (2.45) for ξ, 20) we see that the first term of the denominator cancels the term in the parenthesis. Thus, finally we get…”

Section: Angular Momenta Of the Perturbation In The Inner Regionmentioning

confidence: 86%

Quasinormal modes of supersymmetric microstate geometries from the D1-D5 CFT

Chakrabarty

Ghosh

Virmani

2019

J. High Energ. Phys.

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“…Linearized gravitational fluctuations of any nonspinning UCO are extremely long-lived and decay no faster than logarithmically [85,160,161,370]. Indeed, such perturbations can be again understood in terms of modes quasi-trapped within the potential barrier shown in Fig.…”

Section: Nonlinear Instabilities I: Long-lived Modes and Their Backrementioning

confidence: 98%

Testing the nature of dark compact objects: a status report

2019

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Very compact objects probe extreme gravitational fields and may be the key to understand outstanding puzzles in fundamental physics. These include the nature of dark matter, the fate of spacetime singularities, or the loss of unitarity in Hawking evaporation. The standard astrophysical description of collapsing objects tells us that massive, dark and compact objects are black holes. Any observation suggesting otherwise would be an indication of beyond-the-standard-model physics. Null results strengthen and quantify the Kerr black hole paradigm. The advent of gravitationalwave astronomy and precise measurements with very long baseline interferometry allow one to finally probe into such foundational issues. We overview the physics of exotic dark compact objects and their observational status, including the observational evidence for black holes with current and future experiments.

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“…We will not discuss specific models, but we would like to highlight two general results. Linearized gravitational fluctuations of any nonspinning UCO are extremely long-lived and decay no faster than logarithmically [56,112,113,141]. Indeed, such perturbations can be again understood in terms of modes quasi-trapped within the potential barrier shown in Fig.…”

Section: On the Stability Problemmentioning

confidence: 98%

Tests for the existence of black holes through gravitational wave echoes

2017

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The existence of black holes and of spacetime singularities is a fundamental issue in science. Despite this, observations supporting their existence are scarce, and their interpretation unclear. We overview how strong a case for black holes has been made in the last few decades, and how well observations adjust to this paradigm. Unsurprisingly, we conclude that observational proof for black holes is impossible to come by. However, just like Popper's black swan, alternatives can be ruled out or confirmed to exist with a single observation. These observations are within reach. In the next few years and decades, we will enter the era of precision gravitational-wave physics with more sensitive detectors. Just as accelerators require larger and larger energies to probe smaller and smaller scales, more sensitive gravitational-wave detectors will be probing regions closer and closer to the horizon, potentially reaching Planck scales and beyond. What may be there, lurking? 1 arXiv:1707.03021v4 [gr-qc]

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Geodesics in supersymmetric microstate geometries

Cited by 27 publications

References 44 publications

Quasinormal modes of supersymmetric microstate geometries from the D1-D5 CFT

Quasinormal modes of supersymmetric microstate geometries from the D1-D5 CFT

Testing the nature of dark compact objects: a status report

Tests for the existence of black holes through gravitational wave echoes

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