Minkowski space and deSitter space have been shown to be stable in GR under small perturbations. Perturbations do not intensify in higher frequency modes--these solutions don't go haywire and develop black holes all over the place.(adsbygoogle = window.adsbygoogle || []).push({});

Piotr Bizon has shown that Anti-deSitter (AdS) space is not stable.

http://inspirehep.net/search?p=find+eprint+1104.3702

This has naturally attracted a lot of attention and Bizon will be giving a plenary talk about it at the GR20 conference at Warsaw in about 3 weeks.

http://gr20-amaldi10.edu.pl/index.php?id=29 [Broken]

To show context, here is a sampling of the scheduled plenary talks:

Monday 8 July

...

Last 60 years of GRG: From the GR3 to GR 20 Warsaw conferences

Abhay Ashtekar, Penn State University, USA

The 1962 GR3 conference in Warsaw/Jablona was a milestone in that, thanks to participants like Bergmann, Bondi, Chandrasekhar, DeWitt, Dirac, Ehlers, Feynman, Infeld, Lichnerowicz, Synge, Weber and Wheeler, it sparked new directions of research in mathematical GR, gravitational waves, quantum gravity and relativistic astrophysics. Our field has evolved tremendously since then. I will illustrate these advances by contrasting what was discussed then and what we know now.

Loop Quantum Gravity (LQG)

Thomas Thiemann, University of Erlangen-Nurnberg, Germany

Loop Quantum Gravity (LQG) is a specific realisation of a Quantum Field Theory of General Relativity including matter based on the canonical approach. In this talk we summarise the current status of LQG. Emphasis will be laid on the physical motivation for and mathematical foundations of the theory as well as recent developments.

Status of Advanced (Ground Based) Gravitational Wave Detectors

M. Evans MKI, M.I.T, USA

...I'll briefly introduce the technological challenges involved in 2nd generation ground based detectors, and then move on to the status of the projects that are currently underway.

Neutron Stars

James Lattimer, Stony Brook University, USA

Neutron stars are laboratories for dense matter and gravitational physics. ... setting bounds to neutron star masses, radii, rotation rates, temperatures and ages.

Tuesday 9 July

A Galactic Scale Gravitational Wave Observatory

Maura McLaughlin, West Virginia University, USA

Timing an array of pulsars could result in the detection of a stochastic gravitational wave background, most likely resulting from an ensemble of supermassive black hole binaries, ...

Numerical relativity: The role of black holes in gravitational wave physics, astrophysics and high-energy physics

Ulrich Sperhake, DAMTP, University of Cambridge, UK

We review the latest advances in the numerical simulation of black hole dynamics in the framework of general relativity and alternative theories of gravity...

...

Wednesday 10 July

Black hole microstate counting and their macroscopic counterpart

Ashoke Sen, Harishchandra Research Institute, India

We survey recent results on the exact counting of the microstates of a class of supersymmetric black holes in string theory,...

...

Entanglement Entropy and Gravity/Condensed Matter Correspondence

Tadashi Takayanagi , YITP, Kyoto University, Japan

The entanglement entropy has been very important in various subjects such as the quantum information theory, condensed matter physics and quantum gravity...

...

Resolving Black Holes with the Event Horizon Telescope

Avery Broderick, Perimeter Institute, Canada

Supermassive black holes reside at the centers of most, if not all, galaxies ... However, due to their compact nature, it remains unclear how they grow, launch relativistic outflows, and even if event horizons exist. These questions are now being answered by an unprecedented capability to resolve structure ..., an Earth-sized array of millimeter-wave observatories, and how ... observations are already providing novel insights...

Thursday 11 July

Planck results and consequences for Cosmology

Georges Efstathiou, University of Cambridge, UK

Is AdS stable?

Piotr Bizoń, Uniwersytet Jagielloński, Poland

The short answer is: most likely not. A longer answer, to be presented in the talk, will include recent numerical, physical, and mathematical evidence which indicates that the AdS space is unstable.

...

...

Friday 12 July

Observational Results from Ground-based Gravitational Wave Detectors

Marie Anne Bizouard, LAL Orsay, France & Carleton college USA

...

Experimental Gravitation with Cold Atoms

Peter Wolf, SYRTE, Observatoire de Paris, France

... Over the last decades precision metrology has moved away from “classical” methods towards quantum phenomena, in particular those of atomic physics,...

I will give a (necessarily non-exhaustive) overview of recent and near future experiments in gravitation that are based on atomic physics, and more precisely on sensors using laser cooled atoms for ultimate precision. ...

Present and future cosmological constraints on Dark Energy

Tamara Davis, University of Queensland, Australia

... Every measurement made so far remains consistent with dark energy being a cosmological constant, or vacuum energy. ...

In this talk I will review the many varied observations that now confirm dark energy, why we trust them, where their weaknesses lie, and show the points of slight conflict that are appearing. I will also review upcoming projects that should provide different types of cosmological information that will help distinguish between different theoretical explanations for dark energy.

=====end of plenary talks schedule======

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# Is AdS stable?

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