Signatures of extra dimensions in gravitational waves Considering gravitational waves propagating on the most general 4+N-dimensional space-time, we investigate the effects due to the N extra dimensions on the four-dimensional waves. All wave equations are derived in general and discussed. On Minkowski4 times an arbitrary Ricci-flat compact manifold, we find: a massless wave with an additional polarization, the breathing mode, and extra waves with high frequencies fixed by Kaluza–Klein masses. We discuss whether these two effects could be observed.
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You honor me by reading this. I am a philosopher, mathematician, and logician by vocation. Let's warm-up with a joke: How does a string-theorist propose for marriage? With a Hodge diamond chiral ring.
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