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Article
Physics, Multidisciplinary
Emil J. Martinec et al.
Summary: The BPS sector in AdS3/CFT2$AdS_3/CFT_2$ duality has been a fruitful field for studying the gauge/gravity duality, exploring the match between black hole entropy and the CFT elliptic genus, constructing geometrical microstates, and identifying their CFT counterparts. Worldsheet methods are used to study the relation between string theory and corresponding CFT quantities. By matching individual BPS strings to symmetrical product orbifold CFT, an exact match is found between known constructions of microstate geometries and BPS supergraviton strings condensates, shedding light on the role of tensionless strings in black hole microstructure.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2023)
Article
Physics, Particles & Fields
Nejc Ceplak et al.
Summary: We analyze the BPS equations of N=(1, 0) supergravity theory in six dimensions coupled to a vector and tensor multiplet and reduce them to a set of linear differential equations. This triangular system exhibits quadratic sourcing between layers of equations. We explore explicit examples and discuss the construction of new families of microstate geometries, expecting it to lead to new branches of superstrata with momentum encoded in a new class of charge carriers.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Emil J. Martinec
Summary: In AdS(3), the string theory with purely NS-NS fluxes and vanishing RR moduli exhibits a continuum of winding string excitations in radial plane wave states. These strings can be emitted by BTZ black holes, forming a massive quantum stream, similar to the solar wind, that flows towards the AdS(3) boundary. The presence of this winding string sector provides a decay channel for black holes to evaporate without the need for coupling to an external reservoir or matching the AdS(3) throat to an asymptotically flat region.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Nejc Ceplak
Summary: We construct smooth and horizonless microstate geometries of the supersymmetric D1-D5-P black hole in six-dimensional supergravity, where the momentum charge is carried by a vector field. These geometries are asymptotically AdS(3) x S-3 with an AdS(2) throat that smoothly caps off. We propose a holographic dual for these bulk solutions and discuss their extension to asymptotically flat space. In addition, we uplift the full six-dimensional supersymmetric ansatz to ten dimensions, showing that there exists a frame in which the geometries based on vector field momentum carriers are entirely in the NS-NS sector, making them potential starting points for exploring stringy black-hole microstates.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Pierre Heidmann
Summary: A non-BPS linear ansatz is derived using the charged Weyl formalism in string and M-theory backgrounds. The ansatz describes static and axially-symmetric solutions with an arbitrary number of non-BPS sources, corresponding to various brane, momentum, and KKm charges. Several families of solutions, such as chains of black holes and smooth bubbling geometries, are constructed and their physics is studied.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Bogdan Ganchev et al.
Summary: In this article, non-BPS solutions of 6D (1,0) supergravity coupled to two tensor multiplets are constructed using a novel approach. These solutions are shown to have a dual interpretation as non-supersymmetric heavy operators in the D1-D5 CFT, providing quantitative evidence that they are bound states of mutually non-BPS light BPS operators.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Nejc Ceplak et al.
Summary: This study investigates tidal effects in a family of black hole microstate geometries using infalling null geodesics. The results show tidal stresses along all spatial directions, including internal toroidal directions, and these effects oscillate as a function of distance from the bottom, alternating between compression and stretching.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Bogdan Ganchev et al.
Summary: This paper investigates a two-parameter family of generalized superstrata, proves their supersymmetry, and obtains an analytical smooth solution. By analyzing singular brane distributions, it demonstrates the access to different membrane distributions while maintaining supersymmetry in three-dimensional gauged supergravity.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Ibrahima Bah et al.
Summary: We construct a class of topological solitons in gravity supported by internal electromagnetic flux with no net charges. These solitons are obtained in a six-dimensional Einstein-Maxwell theory with a three-form flux and can be uplifted to type IIB supergravity on T-4. They exhibit intriguing properties, such as being asymptotic to a torus fibration over four-dimensional Minkowski spacetime, and can describe bound states similar to BPS and anti-BPS D1-D5 black holes.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Bogdan Ganchev et al.
Summary: In this paper, we analyze the BPS equations in the superstratum sector of three-dimensional gauged supergravity. We obtain multi-parameter supersymmetric solutions that include elliptical deformations of the supertubes underlying standard superstrata. We uplift the three-dimensional solutions to obtain the corresponding six-dimensional geometries. This yields new families of elliptically-deformed, ambi-bolar hyper-Kahler geometries in four dimensions with a non-tri-holomorphic U(1) isometry. We also find a new family of scaling superstrata whose S-dual lives entirely within the NS-sector of supergravity and can be analyzed using string probes.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Bogdan Ganchev et al.
Summary: A three-parameter family of non-extremal microstate geometries, dual to states and deformations of the D1-D5 CFT, were constructed using a Q-ball-inspired Ansatz. The solutions were found by solving eleven functions of one variable perturbatively and numerically, showing a good match. Normal mode frequencies of the solutions were found to depend on the amplitudes of the excitations. This paper serves as a Proof of Concept for the Q-ball-inspired approach, opening up possibilities for further calculations in supergravity and the dual holographic field theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Iosif Bena et al.
Summary: We calculate the quasi-normal frequencies of scalars in asymptotically-flat microstate geometries with the same charge as a D1-D5-P black hole. The results suggest that the decay times of microstate geometries with deeply-capped BTZ throats are set by the central charge of the dual CFT to the power of twice the dimension of the operator dual to the mode. Additionally, the energy decay at large t is bounded by (log(t))(-2) and comparable to the behavior of ultracompact stars.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Emil J. Martinec et al.
Summary: This study examines the fate of a massless (or ultra-relativistic massive) string probe propagating down the throat of a microstate geometry in the D1-D5 system, encountering large tidal forces and being effectively trapped far down the throat. The stretching of the string is found to be proportional to the incident energy and robs the probe of the kinetic energy it would need to travel back up the throat, leading to weak gravitational echoes as a potential consequence.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Anthony Houppe et al.
Summary: The paper analyzes the supersymmetry transformations of gauged SO(4) supergravity coupled to extra hypermultiplets in three dimensions, identifying large families of smooth BPS solutions that preserve four supersymmetries. These solutions lead to smoothly-capped BTZ geometries from a three-dimensional perspective, with the twisting of the spin connection, holomorphy of the fields, and Chern-Simons connections playing crucial roles in their existence. The paper also demonstrates how the consistent truncation of superstrata closes the circle, showing the incorporation of every feature of the superstratum into the three-dimensional BPS structure.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
T. Daniel Brennan et al.
Summary: The near-horizon region of Neveu-Schwarz fivebranes serves as interesting examples of gauge/gravity duality, revisited using tools of null-gauged WZW models in worldsheet string theory. The structure of wrapped and/or intersecting fivebranes reveal the effective geometry of the fivebrane throat in various examples, with variant gaugings yielding linear dilaton fivebrane throats with AdS(3) caps, offering insights into the near-BPS structure of corresponding spacetime CFT duals.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Sami Rawash et al.
Summary: Researchers have identified the holographic dual of asymptotically Anti-de Sitter supergravity solutions and further investigated the role of corresponding light operators in the conformal field theory states. The proposed heavy pure CFT states in the D1-D5 system have been extensively studied, with an expanded dictionary helping to pinpoint the specific actions of these light operators.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Nejc Ceplak et al.
Summary: The connected tree-level part of 4-point holographic correlators in AdS(3) x S-3 x M involving multi-trace and single-trace operators were derived. These correlators were found to be compactly written in terms of Bloch-Wigner-Ramakrishnan functions for multi-trace operators. Consistency checks were performed on the derived expressions and anomalous dimensions of non-BPS double-trace operators were extracted.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Pierre Heidmann et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Review
Astronomy & Astrophysics
Masaki Shigemori
GENERAL RELATIVITY AND GRAVITATION
(2020)
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Daniel R. Mayerson et al.
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(2020)
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Emil J. Martinec et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
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Physics, Particles & Fields
F. Aprile et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Astronomy & Astrophysics
Elaheh Bakhshaei et al.
CLASSICAL AND QUANTUM GRAVITY
(2019)
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Nejc Ceplak et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
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Stefano Giusto et al.
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(2019)
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Pierre Heidmann et al.
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(2019)
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Bidisha Chakrabarty et al.
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(2019)
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Emil J. Martinec et al.
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(2019)
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Shaun Hampton et al.
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(2019)
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Iosif Bena et al.
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Iosif Bena et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
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Physics, Particles & Fields
Emil J. Martinec et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Review
Astronomy & Astrophysics
Oscar J. C. Dias et al.
CLASSICAL AND QUANTUM GRAVITY
(2016)
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Iosif Bena et al.
PHYSICAL REVIEW LETTERS
(2016)
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(2015)
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(2015)
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(2015)
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G. W. Gibbons et al.
CLASSICAL AND QUANTUM GRAVITY
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