Causal patch
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A causal patch is a region of spacetime connected within the relativistic framework of causality (causal light cones).
Background
[edit | edit source]After Leonard Susskind proposed the black hole complementarity conjecture for black holes in quantum gravity, he realized it would also apply to a de Sitter universe with a positive cosmological constant with the cosmological horizon in place of the event horizon. The region within the horizon is the causal patch,[1][2] and it is self-contained. This means we may neglect what happens beyond the cosmological horizon. A consequence of this radical conjecture is that the total number of states of the universe is finite.
References
[edit | edit source]See also
[edit | edit source]| Central concepts | |||||||||
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| Toy models | |||||||||
| Quantum field theory in curved spacetime | |||||||||
| Black holes | |||||||||
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| Applications | |||||||||
See also:  Template:Quantum mechanics topics | |||||||||
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