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String Theory and Quantum Gravity: Holography and Black Branes

English title String Theory and Quantum Gravity: Holography and Black Branes
Applicant Blau Matthias
Number 149173
Funding scheme Project funding
Research institution Institut für Theoretische Physik Universität Bern
Institution of higher education University of Berne - BE
Main discipline Theoretical Physics
Start/End 01.10.2013 - 30.09.2014
Approved amount 114'400.00
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Keywords (9)

AdS/CFT correspondence; holography; quantum gravity; blackfolds; black holes; space-time singularities; black branes; string theory; Schrödinger space-time

Lay Summary (German)

Lead
Bei diesem Forschungsprojekt handelt es sich um ein Projekt aus dem Bereich der theoretischen Physik. Eine der grossen ungelösten Fragen der theoretischen Physik ist das Problem der Quantengravitation, d.h. die Formulierung einer konsistenten quantentheoretischen Beschreibung der Schwerkraft, wie sie z.B. erforderlich ist, um das sehr frühe Universum oder das Langzeitverhalten von schwarzen Löchern zu beschreiben. Dieses Projekt befasst sich mit zwei Aspekten dieses Problems.
Lay summary

Einer der vielversprechendsten Zugänge zu diesem Problem beruht auf der sogenannten Stringtheorie, insbesondere auf einer sich aus ihr heraus entwickelten holographischen Beschreibung der Quantengravitation (die sogenannte AdS/CFT Korrespondenz und ihre Verallgemeinerungen). Allerdings sind trotz enormer Fortschritte in den letzten Jahren viele Aspekte dieser Beschreibung und zahlreiche Fragen die im Zusammenhang mit schwarzen Löchern auftreten noch nicht vollständig und in befriedigender Weise verstanden.

Inhalt dieses Forschungsprojekts sind zwei miteinander verwandte Projekte die sich mit den oben angesprochenen Fragestellungen beschäftigen, und zwar für Raum-Zeiten mit unkonventioneller ("Schrödinger") Asymptotik, für die sowohl das Verständnis von Holographie als auch das von schwarzen Löchern noch in den Kinderschuhen stecken.

Einerseits geht es daher um Holographie in solchen Raum-Zeiten. Hier ist das Ziel, ein mehr systematisches und mathematisch-konzeptionelles Verständnis von Holographie in diesen Räumen zu erhalten als es bisher gibt. Und andererseits geht es um schwarze Löcher (und exotischere schwarze Objekte) in solchen Raum-Zeiten. Hier ist das primäre Ziel, die sogenannte "blackfold" Technologie (eine im Prinzip sehr effiziente Methode, um Existenz und Eigenschaften von schwarzen Objekten zu studieren) für diese Situation zu adaptieren, um dadurch ein besseres
und systematischeres Verständnis dieser schwarzen Objekte zu erhalten.


Direct link to Lay Summary Last update: 10.10.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Blackfolds, Plane Waves and Minimal Surfaces
Armas Jay, Blau Matthias (2015), Blackfolds, Plane Waves and Minimal Surfaces, in JHEP, 07, 156-156.
New Geometries for Black Hole Horizons
Armas Jay, Blau Matthias (2015), New Geometries for Black Hole Horizons, in JHEP, 07, 048-048.
Uniqueness of Black Holes with Bubbles in Minimal Supergravity
Armas Jay (2015), Uniqueness of Black Holes with Bubbles in Minimal Supergravity, in Journal of Classical and Quantum Gravity, 32(4), 045001-045001.
(Non)-Dissipative Hydrodynamics on Embedded Surfaces
Armas Jay (2014), (Non)-Dissipative Hydrodynamics on Embedded Surfaces, in JHEP, 1409, 047-047.
Black Holes and Biophysical (Mem)-branes
Armas Jay, Harmark Troels (2014), Black Holes and Biophysical (Mem)-branes, in Physical Review D, 90(12), 124022-124022.
Black Probes of Schrödinger Spacetimes
Armas Jay, Blau Matthias (2014), Black Probes of Schrödinger Spacetimes, in JHEP, 1408, 140-140.
Constraints on the effective fluid theory of stationary branes
Armas Jay, Harmark Troels (2014), Constraints on the effective fluid theory of stationary branes, in JHEP, 1410, 63-63.

Collaboration

Group / person Country
Types of collaboration
M. O'Loughlin (Univ. Nova Gorica) Slovenia (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
G. Thompson (ICTP, Trieste) Italy (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
J. Hartong (Niels Bohr Institute, Copenhagen) Denmark (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
International Conference on Recent Developments in String Theory Talk given at a conference Black Holes and Biophysical (Mem)-branes 21.07.2014 Monte Verità, Ascona, Switzerland Armas Jacome;
Workshop on New frontiers in dynamical gravity Talk given at a conference Elastic expansion, biophysical (mem)-branes and higher order blackfold approach 24.03.2014 Cambridge, Great Britain and Northern Ireland Armas Jacome;
University of Barcelona Individual talk (Non)-dissipative hydrodynamics on embedded surfaces 21.10.2013 Barcelona, Spain Armas Jacome;


Self-organised

Title Date Place
International Conference on Recent Developments in String Theory 21.07.2014 Monte Verità, Ascona, Switzerland

Awards

Title Year
Congressi Stefano Franscini award for the best presentation entitled “Black Holes and Biophysical (Mem)-branes” at the conference “Recent Developments in String Theory” 2014

Associated projects

Number Title Start Funding scheme
132412 String Theory, Quantum Gravity, and Space-Time Singularities 01.10.2010 Project funding

Abstract

One of the major unsolved problems of theoretical high energy and gravitational physics is the formulation of a consistent theory of quantumgravity and its unification with the other fundamental interactions.One of the main motivations for research in string theory and quantumgravity is the desire to understand the intriguing puzzles and problemsposed by Black Holes, related e.g. to Hawking radiation and the information loss paradox, the origin of black hole entropy and the thermodynamic properties of black holes, and the role of holography in a quantum theory of gravity.While string theory (and some other approaches to quantum gravity) havealready provided various profound new insights into these questions,one is still far from a complete understanding of these issues. In particular, generalisations of the (well understood) AdS/CFT realisation of holography to other asymptotics on the one hand, and the classical and semi-classical properties of black objects in higher dimensions and/or with unconventional (non-asymptotically flat, non-AdS) asymptotics on the other are only incompletely understood at present and still full of puzzles and surprises.This research proposal consists principally of two interrelated projectsaddressing the above issues:Global Aspects of Schrödinger Holography This is a continuation of a previous and ongoing reseach project and builds upon previous work done with and by my former SNF postdoc Jelle Hartong and my former SNF PhD student Blaise Rollier with whom this work will also be carried out. Its aim is to address a number of conceptual and global issues regarding holography for asymptotically Schrödinger space-times that have arisen and are controversial or unresolved in the current literature, in particular regarding the definition of the Schrv?dinger boundary and the nature of the Fefferman-Graham expansion.AdS and Schrödinger Black Branes and Blackfold Techniques The study of black holes and branes in asymptotically Schrödingerspace-times is still in its infancy. The aim of this project is to adapt the recently developed blackfold methodology, a new and remarkably efficient tool for constructing and understanding black objects in gravity, supergravity and string theory, via AdS to Schrödinger asymptotics in order to construct these black objects and learn about their properties. This project requires dual and complementary expertise on global properties of Schrödinger space-times and blackfolds, and will be carried out jointly by myself and my current postdoc Jay Armas who is an expert on blackfold techniques.Both research projects also provide points of entry, and contain subprojectssuitable for, potential new PhD-students.
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