Bunch–Davies vacuum

In quantum field theory in curved spacetime, there is a unique quantum state over a background de Sitter space which is invariant under all the isometries. This is a thermal state, which is at the de Sitter temperature of where H is the Hubble constant. This state is called the Bunch-Davies state.^[1]

This explains the origin of cosmological perturbation fluctuations in inflationary models.

See also

• Quantum field theory in curved spacetime
• Unruh radiation
• Hawking radiation
• Inflation (cosmology)

References

1. ^ Bunch, Timothy Stephen; Davies, Paul (1978). "Quantum Field Theory In De Sitter Space: Renormalization By Point Splitting". Proceedings of the Royal Society of London. A 360: 117.