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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
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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...
Space-Time Compactification, Non-Singular Black Holes, Wormholes and Braneworlds via Lightlike Branes
Space-Time Compactification Non-Singular Black Holes
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2010/12/24
We describe a concise general scheme for constructing solutions of Einstein-Maxwell-Kalb-Ramond gravity-matter system in bulk space-time interacting self-consistently with one or more (widely separate...
Space-Time Compactification, Non-Singular Black Holes, Wormholes and Braneworlds via Lightlike Branes
Space-Time Compactification Non-Singular Black Holes Wormholes and Braneworlds Lightlike Branes
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2010/12/21
We describe a concise general scheme for constructing solutions of Einstein-Maxwell-Kalb-Ramond gravity-matter system in bulk space-time interacting selfconsistently with one or more (widely separated...
Stability of thin-shell wormholes supported by ordinary matter in Einstein-Maxwell-Gauss-Bonnet gravity
thin-shell wormholes Einstein-Maxwell-Gauss-Bonnet gravity
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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
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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...
Wormholes or Gravastars?
Wormholes Gravastars Zero Point Energy
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2010/3/18
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...
Trapped ghosts: a new class of wormholes
Trapped ghosts wormholes
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2010/3/18
We construct examples of static, spherically symmetric wormhole solutions in general relativity with a minimally coupled scalar field $\phi$ whose kinetic energy is negative in a restricted region of ...
An anti-Schwarzshild solution: wormholes and scalar-tensor solutions
wormholes scalar-tensor solutions
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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
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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...
Phantom Wormholes in (2+1)-dimensions
Lower dimensional gravity Wormhole Phantom energy
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2010/3/17
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
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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...
General class of vacuum Brans-Dicke wormholes
vacuum Brans-Dicke wormholes f(R) gravity
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2010/3/17
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 ...
Implications of a Decay Law for the Cosmological Constant in Higher Dimensional Cosmology and Cosmological Wormholes
Extra-dimensions Dark energy Phantom energy Superacceleration Λ− decaying cosmology Big bounce
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2010/7/8
Implications of a Decay Law for the Cosmological Constant in Higher Dimensional Cosmology and Cosmological Wormholes.