Non-BPS multi-bubble microstate geometries

2018

Self Cite

119

String theory dynamics on certain fivebrane supertube backgrounds is described by an exactly solvable null-gauged WZW model. We use this description to compute the spectrum of closed string excitations on the three-charge nonsupersymmetric solution found by Jejjala, Madden, Ross and Titchener, as well as its supersymmetric limit. The low-lying spectrum matches that of supergravity modes in the effective geometry and exhibits an underlying group-theoretic structure. Winding sectors describe strings carrying the same charges as the background; processes whereby strings turn into flux or vice-versa are mediated by large gauge transformations on the worldsheet. The S-matrix of such wound strings probes microstructure of the fivebrane source that is hidden in the supergravity approximation. arXiv:1803.08505v1 [hep-th]

Section: Introduction and Discussionmentioning

confidence: 99%

String dynamics in NS5-F1-P geometries

Martinec

Massai

2018

Self Cite

119

“…To settle the important question of backreaction it is desirable to construct fully backreacted asymptotically AdS 2 non-extremal smooth microstate geometries. There has been significant recent progress in constructing non-extremal microstate solutions [95][96][97][98], and this technology appears to be the most promising avenue for this future line of investigation.…”

Section: Other Future Directionsmentioning

confidence: 99%

AdS2 holography: mind the cap

Bena

Heidmann

2018

Self Cite

117

AdS 2 plays an extremely important role in black-hole physics. We construct several infinite families of supergravity solutions that are asymptotically AdS 2 in the UV, and terminate in the IR with a cap that is singular in two dimensions but smooth in ten dimensions. These solutions break conformal invariance, and should correspond to supersymmetric ground states of a holographically dual CFT 1 . We solve the free massless scalar wave equation on a family of these solutions, finding towers of finite-energy normalizable bound-state excitations. We discuss the intriguing possibility that these excitations correspond to time-dependent excitations of the dual CFT 1 , which would imply that this CFT 1 is dynamical rather than topological, and hence cannot have a conformally invariant ground state.Dedicated to the memory of Joe Polchinski

“…For example, the JMaRT solution admits a BPS limit to a two-nut supersymmetric solution, i.e. with a single bubble, while the solutions described in [41,42] admit a BPS limit in which the single bolt becomes an additional non-rigid cycle attached to two nuts, among the other nuts.…”

Section: Introduction and Discussionmentioning

confidence: 99%

“…the analytic continuation of the Kerr-NUT black hole solution to Euclidean signature, for which the horizon is replaced by a smooth bolt. Solutions based on this instanton and generalisations thereof were constructed in [47,[40][41][42].…”

Section: Two-bolt Gravitational Instantonmentioning

confidence: 99%

Two kissing bolts

Bossard

Katmadas

2018

Self Cite

The study of non-supersymmetric black hole microstates offers the potential to resolve the black hole information paradox. A system of equations was recently obtained that enables the systematic construction of non-supersymmetric smooth horizonless supergravity solutions, that are candidates to describe microstates of non-extremal black holes. Within this system we construct a family of six-dimensional supergravity solutions that feature two topologically-nontrivial three-cycles known as bolts. The two bolts touch at a single point and are supported by fluxes. We find that the fluxes on the two three-cycles can be either aligned or anti-aligned, and exhibit examples of both. We present several examples of smooth solutions, including near-extremal solutions that have an approximate AdS 3 region, and far-from extremal solutions that have arbitrarily small charge compared to their mass.