energy momentum tensor

[′en·ər·jē mə′men·təm ‚ten·sər]

(physics)

A tensor whose 16 elements give the energy density, momentum density, and stresses in a distribution of matter or radiation.

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References in periodicals archive ?

In this situation as well validity of the above expression for all null vectors [l.sub.a], along with two times contracted Bianchi identity and covariant conservation of matter energy momentum tensor, amounts to furnishing the ten components of Einstein's equations.

Field Equations for Lovelock Gravity: An Alternative Route

The known exact solutions may be classified into (at least) four classes [2], namely, the algebraic classification of conformal curvature, physical characterization of the energy momentum tensor, existence, and structure of preferred vector fields and group of motions.

Homotheties of a Class of Spherically Symmetric Space-Time Admitting [G.sub.3] as Maximal Isometry Group

The energy momentum tensor of the electromagnetic field [T.sup.[mu]v] not generally symmetric.

The structure of the photon in complex vector space

for all vector fields X, Y where S is the Ricci tensor of the type (0, 2), r is the scalar curvature, k is the gravitational constant and T is the energy momentum tensor of type (0, 2).

On LP-Sasakian manifolds with a coefficient [alpha] satisfying certain curvature conditions

So, for example, if one begins with a vacuum seed solution, then it is known that the Einstein tensor is zero and so only the conformal part must now be considered in conjunction with a perfect fluid energy momentum tensor. Such solutions are referred to as conformally Ricci-flat spacetimes.

Conformal mappings in relativistic astrophysics

In the general theory of relativity, energy momentum tensor plays an important role and the condition on energy momentum tensor for a perfect fluid space time changes the nature of space time (5).

Space time with generalized covariant recurrent energy momentum tensor

here [T.sub.ij] being the ordinary energy momentum tensor associated to isotropic matter and radiation.

Cosmology with dark energy and dark matter

the new improved energy momentum tensor is defined as

Standard Model Effective Potential from Trace Anomalies

where k is the Einstein's gravitational constant, T is the energy momentum tensor of type (0,2) given by

On some classes of weakly projective symmetric manifolds

Although there are physical arguments for equating the Einstein tensor to the energy momentum tensor ([G.sub.[micro]v] = K[T.sub.[micro]v]), and thus into analogues for Newton's Law of Gravity, we note simply in this paper that Eq.

The Poisson equation, the cosmological constant and dark energy

One way is to modify the dynamical field equations by taking negative pressure in the form of energy momentum tensor [T.sub.[mu][nu]].

Inflation in f(R, [phi]) Gravity with Exponential Model

Therefore, the nonzero components of the energy momentum tensor from (11) using (13) are

A Cylindrically Symmetric and Static Anisotropic Fluid Spacetime and the Naked Singularity