An Introduction to Cascading Gravity and Degravitation

Understand

Cascading gravity is an explicit realization of the idea of degravitation, where gravity behaves as a high-pass filter.

• This could explain why a large cosmological constant does not backreact as much as anticipated from standard General Relativity.
• The model relies on the presence of at least two infinite extra dimensions while our world is confined on a four-dimensional brane.
• Gravity is then four-dimensional at short distances and becomes weaker and weaker at larger distances.