نتایج جستجو برای: metric of spacetime
تعداد نتایج: 21173267 فیلتر نتایج به سال:
The Lemaître-Tolman-Bondi (LTB) model represents an inhomogeneous spherically symmetric universefilledwithfreelyfallingdustlikematterwithoutpressure. First,wehaveconsideredaFinslerian anstaz of (LTB) and have found a Finslerian exact solution of vacuum field equation. We have obtained the R(t,r) and S(t,r) with considering establish a new solution of Rµν = 0. Moreover, we attempttouseFinslergeo...
We give a brief overview of the nature of spacetime emerging from string theory. This is radically different from the familiar spacetime of Einstein’s relativity. At a perturbative level, the spacetime metric appears as “coupling constants” in a two dimensional quantum field theory. Nonperturbatively (with certain boundary conditions), spacetime is not fundamental but must be reconstructed from...
General relativity describes spacetime as far as large scales are concerned and is based on the geometric paradigm discovered by Riemann. It replaces the flat (pseudo) metric of Poincaré, Einstein, and Minkowski, by a curved spacetime metric whose components form the gravitational potential. The basic equations are Einstein equations (Figure 1) which have a clear geometric meaning and are deriv...
In their proposed compactification of superstring [4], Candelas, Horowitz, Strominger and Witten took the matric product of a maximal symmetric four dimensional spacetime M with a six dimensional Calabi-Yau vacua X as the ten dimensional spacetime; they identified the Yang-Mills connection with the SU(3) connection of the Calabi-Yau metric and set the dilaton to be a constant. To make this theo...
Introduction Virtual Particles "Metric" Particles Particles and the Spacetime Metric The Weak Force Mechanism Leptons and "Identity" Charge Neutrinos The "W" IVB Mechanism Links and References
One of the fundamental problems in numerically constructing spacetimes without symmetries (3D numerical relativity) is the choice of suitable coordinates. The task is not just to find a good coordinate system for a known spacetime, but the spacetime is not actually known when the calculation begins, so that one has to construct the coordinate system along with the spacetime. In principle, once ...
In this study time-dependent and spherically symmetric solutions of the Einstein field equations in an anisotropic background with a purely radial tension are presented. There exist three classes of solutions,1) An open spacetime with a wormhole at its center. 2) A conical spacetime. 3) A closed spacetime. These inhomogeneous solutions are reduced to FRW spacetimes in matter-dominated era, as...
In this paper, we study the Fisher information metric on space of coupling constants both sides duality between non-relativistic dipole field theories and string theory in Schrödinger spacetime. We consider following setup. gauge side one can deform a given conformal by proper scalar operator compute quantum via two-point correlation function two such operators. On deformation corresponds to pr...
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