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imported>Pythagoras0 (새 문서: * cosmological constant * Einstein field equation * energy-momentum tensor * Hamiltonian formulation of GR) |
imported>Pythagoras0 |
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+ | ==Vacuum field equation and gravitational field equation== | ||
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+ | * gravitational potentail satisfies the following equation (Poisson's equation) | ||
+ | :<math>\nabla^2 \phi = - 4 \pi G \rho</math> | ||
+ | * <math>\rho</math> is the matter density | ||
+ | * in relativity theory, the metric plays the role of gravitational potential | ||
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+ | ==energy-momentum tensor== | ||
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+ | * also called as stress-energy tensor | ||
+ | * describe the densities and flows of energy and momentum | ||
+ | * all forms of mass-energy can be sources of gravitational fields | ||
+ | * the stress-energy tensor <math>T_{\mu \nu}</math> acts as a source of the gravitational field | ||
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+ | ==relativistic Vacuum field equation== | ||
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+ | ==relativistic matter field equation== | ||
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+ | * [[Einstein field equation]] | ||
+ | :<math>R_{\mu \nu} - {1 \over 2}g_{\mu \nu}\,R + g_{\mu \nu} \Lambda = {8 \pi G \over c^4} T_{\mu \nu}</math> | ||
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+ | ==related items== | ||
* [[cosmological constant]] | * [[cosmological constant]] | ||
* [[Einstein field equation]] | * [[Einstein field equation]] | ||
* [[energy-momentum tensor]] | * [[energy-momentum tensor]] | ||
* [[Hamiltonian formulation of GR]] | * [[Hamiltonian formulation of GR]] |
2014년 11월 16일 (일) 17:42 판
Vacuum field equation and gravitational field equation
- gravitational potentail satisfies the following equation (Poisson's equation)
\[\nabla^2 \phi = - 4 \pi G \rho\]
- \(\rho\) is the matter density
- in relativity theory, the metric plays the role of gravitational potential
energy-momentum tensor
- also called as stress-energy tensor
- describe the densities and flows of energy and momentum
- all forms of mass-energy can be sources of gravitational fields
- the stress-energy tensor \(T_{\mu \nu}\) acts as a source of the gravitational field
relativistic Vacuum field equation
relativistic matter field equation
\[R_{\mu \nu} - {1 \over 2}g_{\mu \nu}\,R + g_{\mu \nu} \Lambda = {8 \pi G \over c^4} T_{\mu \nu}\]