COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring. |

University of Cambridge > Talks.cam > DAMTP Friday GR Seminar > Warped AdS3 black holes: classical stability and quantum field theory

## Warped AdS3 black holes: classical stability and quantum field theoryAdd to your list(s) Download to your calendar using vCal - Hugo Ferreira (University of Nottingham)
- Friday 22 November 2013, 13:00-14:00
- Pavilion B Potter Room (B1.19).
If you have a question about this talk, please contact Helvi Witek. (2+1)-dimensional gravity allows us to study aspects of classical and quantum gravity in a simpler technical setting which retains much of the conceptual complexity of the standard (3+1)-dimensional gravity. However, pure Einstein gravity lacks propagating degrees of freedom in 2+1 dimensions. Topologically Massive Gravity is a deformation of GR which includes propagating degrees of freedom. Besides the famous BTZ black hole solution, this theory has a whole new class of rotating black hole solutions—the warped AdS3 black holes—which can be viewed as deformed BTZ solutions but which, counterintuitively, are not asymptotically AdS—they are actually (almost) asymptotically flat! This gives us a (2+1)-dimensional black hole which closely resembles the Kerr black hole in 3+1 dimensions. In this talk, I will describe the issues of mode stability and quantum field theory of this interesting set of solutions. First, I will show that, in contrast with the BTZ solution, classical superradiance of a massive scalar field on the background of a warped AdS3 black hole is always present. Despite this fact, I then show that the black hole is classically stable to scalar perturbations, namely there are no superradiant instabilities, even if it is enclosed by a stationary mirror with Dirichlet boundary conditions. This is a surprising result in view of the similarity between the causal structure of the warped AdS3 black hole and the Kerr spacetime in 3+1 dimensions, which is classically unstable due to superradiant instabilities. Finally, I will report on current progress on the computation of the renormalised stress-energy tensor of a scalar field in the Hartle-Hawking vacuum using the Hadamard renormalisation technique. When finished, this work will provide the first calculation of this kind for a rotating black hole with asymptotics which resemble asymptotically flat spacetimes. Part of this work has been published in Phys. Rev. D 87 , 124013 (2013). This talk is part of the DAMTP Friday GR Seminar series. ## This talk is included in these lists:- All CMS events
- All Talks (aka the CURE list)
- CMS Events
- Cosmology lists
- Cosmology, Astrophysics and General Relativity
- DAMTP Friday GR Seminar
- DAMTP info aggregator
- Interested Talks
- Kavli Institute for Cosmology Talk Lists
- Pavilion B Potter Room (B1.19)
- Priscilla
- School of Physical Sciences
- bld31
Note that ex-directory lists are not shown. |
## Other listsThe Blackett Society Adolescence: rhetoric, representations, realities discussion group CamPoS (Cambridge Philosophy of Science) seminar Datalog for Program Analysis: Beyond the Free Lunch "Investigating Interactions" Symposium Audio and Music Processing (AMP) Reading Group## Other talksDataFlow SuperComputing for BigData An exploration of grain growth & deformation in zirconium International Women's Day Lecture 2018: Press for Progress by Being an Active Bystander Benefits of social relationships in carrion crows Carers and Careers: The Impact of Caring on Academic Careers Assessment of data completeness in the National Cancer Registry and the impact on the production of Cancer Survival Statistics Single Cell Seminars (August) The role of myosin VI in connexin 43 gap junction accretion Cambridge Rare Disease Summit 2017 The Partition of India and Migration Structural basis for human mitochondrial DNA replication, repair and antiviral drug toxicity TALK CANCELLED Targets for drug discovery: from target validation to the clinic |