Gibbons–Hawking effect

The Gibbons - Hawking effect ( according to Gary Gibbons and Stephen Hawking William ) states that any solution of Einstein's field equations which has a causal horizon, a temperature can be assigned; the causal horizon extends the notion of the event horizon of black holes at cosmological dimensions, it is the surface in space- time, the observer can no longer influence beyond the events.

The example of an event horizon was earlier known in the theory of black holes, where Jacob Bekenstein and Hawking in the early 1970s zuwiesen the surface of such a horizon temperature and thus an entropy. In the case of the Schwarzschild space-time, this is for example the temperature of a black hole of mass,

Hawking had this temperature given in 1975 by the Hawking radiation has a physical interpretation.

An example of a causal horizon of cosmology is the de Sitter spacetime. Reference is made to the Teilchenhorizont reference, the maximum distance that a particle could have come since the beginning of the universe. In this case, the temperature is proportional to the Hubble parameters:

Comments

• General Theory of Relativity