Bounds on the local energy density of holographic CFTs from bulk geometry
Bounds on the local energy density of holographic CFTs from bulk geometry
复制标题
来自体几何的全息 CFT 局部能量密度的界限
DOI:
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
T. Wiseman
中科院分区:
文献类型:
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作者:
S. Fischetti;Andrew Hickling;T. Wiseman
The stress tensor is a basic local operator in any field theory; in the context of AdS/CFT, it is the operator which is dual to the bulk geometry itself. Here we exploit this feature by using the bulk geometry to place constraints on the local energy density in static states of holographic (2+1)-dimensional CFTs living on a closed (but otherwise generally curved) spatial geometry. We allow for the presence of a marginal scalar deformation, dual to a massless scalar field in the bulk. For certain vacuum states in which the bulk geometry is well-behaved at zero temperature, we find that the bulk equations of motion imply that the local energy density integrated over specific boundary domains is negative. In the absence of scalar deformations, we use the inverse mean curvature flow to show that if the CFT spatial geometry has spherical topology but non-constant curvature, the local energy density must be positive somewhere. This result extends to other topologies, but only for certain types of vacuum; in particular, for a generic toroidal boundary, the vacuum’s bulk dual must be the zero-temperature limit of a toroidal black hole.
影响因子:
40.6
作者:
Kunduri HK;Lucietti J
通讯作者:
Lucietti J