Inhomogeneities and topological defects in cosmology...

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Suekdccia
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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, Lorentz, diffeomorphism CPT, spatial/time translational...etc symmetries... However, I have not been able to find any references about this. Is this true? Is there anything about this?
 
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Suekdccia said:
I have heard ...
Can you please provide a specific citation? Context would be helpful.
 
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  • #3
Suekdccia said:
I have not been able to find any references about this.
You heard it from somewhere. Where?
 

FAQ: Inhomogeneities and topological defects in cosmology...

What are inhomogeneities in cosmology?

Inhomogeneities in cosmology refer to variations in the density and temperature of matter and energy in the universe. These variations can be observed in the cosmic microwave background radiation and the distribution of galaxies. Inhomogeneities are crucial for understanding the large-scale structure of the universe and the formation of cosmic structures like galaxies, clusters, and voids.

What are topological defects in the context of cosmology?

Topological defects are irregularities in the fabric of space-time that can occur during phase transitions in the early universe. These include cosmic strings, domain walls, monopoles, and textures. They are remnants of symmetry-breaking processes that occurred as the universe cooled and expanded, and they can provide insights into the conditions of the early universe and the fundamental forces at play.

How do inhomogeneities affect the cosmic microwave background (CMB)?

Inhomogeneities affect the cosmic microwave background by creating small temperature fluctuations that we can observe today. These fluctuations are imprints of the density variations present in the early universe. By studying the CMB, scientists can learn about the initial conditions of the universe, the rate of its expansion, and the nature of dark matter and dark energy.

What role do topological defects play in the formation of cosmic structures?

Topological defects can influence the formation of cosmic structures by acting as seeds for the gravitational collapse of matter. For example, cosmic strings could create regions of higher density that attract surrounding matter, leading to the formation of galaxies and clusters. Although current observations suggest that topological defects are not the primary drivers of structure formation, they still provide valuable insights into the early universe and the processes that shaped its evolution.

Can we observe topological defects directly?

Direct observation of topological defects is challenging due to their elusive nature and the vast scales involved. However, they might leave detectable signatures, such as gravitational waves, distortions in the cosmic microwave background, or specific patterns in the distribution of galaxies. Advanced observational techniques and instruments, such as gravitational wave detectors and high-resolution CMB experiments, are being developed to search for these potential signatures.

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