Modave Lectures on Horizon-Size Microstructure, Fuzzballs and Observations

Mayerson, Daniel R.

doi:10.48550/arxiv.2202.11394

Cited by 5 publications

(6 citation statements)

References 64 publications

(90 reference statements)

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“…These calculations are important [200,201], since ring-down frequencies, echoes and tidal Love numbers can be extracted from gravitational-wave data. These calculations can be done both in superstrata [37,199], where the wave equation for scalar fields is separable [119], and in more complicated BPS bubbling geometries where no such separability exists [202,203].…”

Section: Thermalization Tidal Scrambling and Information Recoverymentioning

confidence: 99%

Fuzzballs and Microstate Geometries: Black-Hole Structure in String Theory

Bena¹,

Martinec²,

Mathur³

et al. 2022

Preprint

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The black-hole information paradox provides one of the sharpest foci for the conflict between quantum mechanics and general relativity and has become the proving-ground of would-be theories of quantum gravity. String theory has made significant progress in resolving this paradox, and has led to the fuzzball and microstate geometry programs. The core principle of these programs is that horizons and singularities only arise if one tries to describe gravity using a theory that has too few degrees of freedom to resolve the physics. String theory has sufficiently many degrees of freedom and this naturally leads to fuzzballs and microstate geometries: The reformation of black holes into objects with neither horizons nor singularities. This not only resolves the paradox but provides new insights into the microstructure of black holes. We summarize the current status of this approach and describe future prospects and additional insights that are now within reach. This paper is an expanded version of our Snowmass White Paper [1].

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Section: Thermalization Tidal Scrambling and Information Recoverymentioning

confidence: 99%

Fuzzballs and Microstate Geometries: Black-Hole Structure in String Theory

Bena¹,

Martinec²,

Mathur³

et al. 2022

Preprint

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“…(For reviews on microstate geometries and the parent fuzzball program, see e.g. [16][17][18][19][20]; and [21,22] for an overview of its applicability in gravitational observations.) In the context of gravitational multipoles, it is interesting to wonder how the presence of near-horizon structure deforms the multipoles away from the black hole value.…”

Section: Jhep02(2023)160mentioning

confidence: 99%

On supersymmetric multipole ratios

Ganchev

Mayerson

2023

J. High Energ. Phys.

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Four-dimensional supersymmetric black holes are static and so have all vanishing multipoles (except the mass monopole). Nevertheless, it is possible to define finite multipole ratios for these black holes, by taking the ratio of (finite) multipoles of supersymmetric multicentered geometries and then taking the black hole scaling limit of the multipole ratios within these geometries. An alternative way to calculate these multipole ratios is to deform the supersymmetric black hole slightly into a non-extremal, rotating black hole, calculate the multipole ratios of this altered black hole, and then take the supersymmetric limit of the ratios. Bena and Mayerson observed that for a class of microstate geometries, these two a priori completely different methods give spectacular agreement for the resulting supersymmetric black hole multipole ratios. They conjectured that this agreement is due to the smallness of the entropy parameter for these black holes. We correct this conjecture and give strong evidence supporting a more refined conjecture, which is that the agreement of multipole ratios as calculated with these two different methods is due to both the microstate geometry and its corresponding black hole having a property we call “large dipole”, which can be interpreted as their center of mass being far away from its apparent center.

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“…(iv) Because microstate geometries have structure, their gravitational multipole moments differ from those of black holes. These multipoles have been extensively characterized and quantified [127][128][129][130][131][132] in the hope that they might ultimately provide some observational signature of microstate structure [133,134].…”

Section: Black-hole-like Behaviormentioning

confidence: 99%

Snowmass White Paper: Micro- and Macro-Structure of Black Holes

Bena¹,

Martinec²,

Mathur³

et al. 2022

Preprint

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The black-hole information paradox provides a stringent test of would-be theories of quantum gravity. String theory has made significant progress toward a resolution of this paradox, and has led to the fuzzball and microstate geometry programs. The central thesis of these programs is that only string theory has sufficiently many degrees of freedom to resolve black-hole microstructure, and that horizons and singularities are artifacts of attempting to describe gravity using a theory that has too few degrees of freedom to resolve the physics. Fuzzballs and microstate geometries recast black holes within string theory as horizonless and singularity-free objects that not only resolve the paradox but provide new insight into the underlying microstructure. We give an overview of this approach, summarize its current status and describe future prospects and insights that are now within reach.

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Modave Lectures on Horizon-Size Microstructure, Fuzzballs and Observations

Cited by 5 publications

References 64 publications

Fuzzballs and Microstate Geometries: Black-Hole Structure in String Theory

Fuzzballs and Microstate Geometries: Black-Hole Structure in String Theory

On supersymmetric multipole ratios

Snowmass White Paper: Micro- and Macro-Structure of Black Holes

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