期刊
CLASSICAL AND QUANTUM GRAVITY
卷 25, 期 19, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0264-9381/25/19/195014
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资金
- US National Science Foundation [PHY05-55669]
- University of California
- BAEF foundation
We describe a new class of boundary conditions for AdS(d+1) under which the boundary metric becomes a dynamical field. The key technical point is to show that contributions from boundary counter-terms in the bulk gravitational action render such fluctuations normalizable. In the context of AdS/CFT, the simplest version of Neumann boundary conditions for AdS promotes the CFT metric to a dynamical field but adds no explicit gravitational dynamics; the gravitational dynamics is just that induced by the conformal fields. Other AdS boundary conditions couple the CFT to a gravity theory of choice. We use this correspondence to briefly explore the coupled CFT + gravity theories and, in particular, for d = 3 we show that coupling topologically massive gravity to a large N CFT preserves the perturbative stability of the theory with negative (three-dimensional) Newton's constant.
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