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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Wormholes, Berry phases and factorization
虫洞 浆果阶段 因子分解 编码拓扑信息
2023/5/15
I shall start by reviewing the connection between the wormholes and entanglement in the context of AdS/CFT. I shall then show how the Berry phase, a geometrical phase encoding information about the to...
Stability of thin-shell wormholes supported by ordinary matter in Einstein-Maxwell-Gauss-Bonnet gravity
thin-shell wormholes Einstein-Maxwell-Gauss-Bonnet gravity
2010/3/18
Recently in (Phys. Rev. D 76, 087502 (2007) and Phys. Rev. D 77, 089903(E) (2008)) a thin-shell wormhole has been introduced in 5-dimensional Einstein-Maxwell-Gauss-Bonnet (EMGB) gravity which was sup...
Wormholes respecting energy conditions and solitonic shells in DGP gravity
Wormholes solitonic shells energy conditions
2010/3/18
We build spherically symmetric wormholes within the DGP theory. We calculate the energy localized on the shell, and we find that for certain values of the parameters wormholes could be supported by ma...
The one loop effective action in a Schwarzschild background is here used to compute the Zero Point Energy (ZPE) which is compared to the same one generated by a gravastar. We find that only when we se...
An anti-Schwarzshild solution: wormholes and scalar-tensor solutions
wormholes scalar-tensor solutions
2010/3/17
We investigate a static solution with an hyperbolic nature, characterised by a pseudo-spherical foliation of space. This space-time metric can be perceived as an anti-Schwarzschild solution, and exhib...
Thin-shell wormholes from charged black holes in generalized dilaton-axion gravity
Thin-shell wormholes black holes
2010/3/17
This paper discusses a new type of thin-shell wormhole constructed by applying the cut-and-paste technique to two copies of a charged black hole in generalized dilaton-axion gravity, which was inspire...
In this paper, we have constructed a (2+1)-dimensional wormhole using inhomogeneous and anisotropic distribution of phantom energy. We have determined the exact form of the equation of state of phanto...
Nonlinear instability of wormholes supported by exotic dust and a magnetic field
wormholes supported exotic dust magnetic field
2010/3/17
Recently, spherically symmetric, static wormholes supported by exotic dust and a radial magnetic field have been derived and argued to be stable with respect to linear radial fluctuations. In this rep...
Recently, traversable wormhole geometries were constructed in the context of f(R) gravity. The latter is equivalent to a Brans-Dicke theory with a coupling parameter w=0, which is apparently excluded ...