Wormhole with Quantum Throat
A wormhole with a quantum throat on the basis of an approximate model of the spacetime foam is presented. An
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Cylindrical thin-shell wormholes
A general formalism for the dynamics of non rotating cylindrical thin-shell wormholes is developed. The time evolution of the throat
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D-Brane Dynamics Near NS5-Branes
We use the Dirac-Born-Infeld action to study the real time dynamics of a $Dp$-brane propagating in the vicinity of $NS5$-branes.
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"Classical" Vortex Nucleation in Superflow Through Small Orifices
We report on numerical solutions of the Gross-Pitaevskii equation for two-dimensional flow of a superfluid condensate through a small orifice.
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4D Wormhole with Signature Change in the Presence of Extra Dimensions
A regular vacuum solution in 5D gravity on the principal bundle with the U(1) structural group is proposed as a
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An effective model of the spacetime foam
An approximate model of the spacetime foam is offered in which each quantum handle (wormhole) is a 5D wormhole-like solution.
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General Dynamic Wormholes and Violation of the Null Energy Condition
Although wormholes can be treated as topological objects in spacetime and from a global point-of-view, a precise definition of what
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Localized Tachyons and RG Flows
We study condensation of closed string tachyons living on defects, such as orbifold fixed planes and Neveu-Schwarz fivebranes. We argue
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On the existence of Kalb-Ramond wormholes
Static spherically symmetric Kalb-Ramond (KR) traversable wormholes in torsioned spacetime are shown not to exist globally since torsion vanishes not
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Scattering problem of scalar wave in wormhole geometry
In this paper, we study the scattering problem of the scalar wave in the traversable Lorentzian wormhole geometry. The potentials
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Thin shells around traversable wormholes
Applying the Darmois-Israel thin shell formalism, we construct static and dynamic thin shells around traversable wormholes. Firstly, by applying the
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Unruh model for the Einstein-Rosen charge: Squealing Wormholes?
We present two kinds of acoustic models for the massless electric charge conceived by Einstein and Rosen in the form
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Wormhole throats in $R^{m}$ gravity
We consider wormhole geometries subject to a gravitational action consisting of non-linear powers of the Ricci scalar. Specifically, wormhole throats
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