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Science Forum Index » Physics - Particle Forum » Could somebody explain to me why the degree of freedom...
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 Posted: Sun May 04, 2008 10:30 am |
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Could somebody explain to me why the degree of freedom of graviton is
D(D-3)/2?
Thanks in advance
Youngsub |
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| Posted: Mon May 05, 2008 7:28 am |
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Guest
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On 4 Maj, 22:30, yy... at (no spam) fas.harvard.edu wrote:
Quote: Could somebody explain to me why the degree of freedom of graviton is
D(D-3)/2?
The metric is a symmetric 2-tensor with D(D+1)/2 components.
Diffeomorphisms give D constraints. Since these constraints are
first class, they count twice (constraint + gauge fixing condition).
D(D+1)/2 - 2D = D(D-3)/2. |
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