All Questions
3
questions
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0
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Could inhomogeneties and/or topological defects break the fundamental symmetries of the universe?
I have heard that some types of inhomogeneties and topological defects (like cosmic strings) in cosmology have been proposed to be able to break fundamental symmetries of nature such as the Poincaré, ...
- 2,462
8
votes
3
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522
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Why are particles described with Poincaré symmetry even though space seems inhomogeneous?
Poincaré transformation consists of translation, rotation, and boosting. And by assuming the physical quantities are invariant and equations are covariant under the transformations, we build the ...
- 479
12
votes
2
answers
843
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Do the standard cosmology models spontaneously break Lorentz symmetry?
In standard cosmology models (Friedmann equations which your favorite choice of DM and DE), there exists a frame in which the total momenta of any sufficiently large sphere, centered at any point in ...
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