#### Filter Results:

- Full text PDF available (10)

#### Publication Year

1985

1996

- This year (0)
- Last 5 years (0)
- Last 10 years (0)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

- Hawking
- Physical review. D, Particles and fields
- 1991

It has been suggested that an advanced civilization might have the technology to warp spacetime so that closed timelike curves would appear, allowing travel into the past. This paper examines this… (More)

It is assumed that the Universe is in the quantum state defined by a path integral over compact four-metrics. This can be regarded as a boundary condition for the wave function of the Universe on… (More)

Black holes came into existence together with the universe through the quantum process of pair creation in the inflationary era. We present the instantons responsible for this process and calculate… (More)

- Hawking
- Physical review letters
- 1992

An interesting two-dimensional model theory has been proposed that allows one to consider black-hole evaporation in the semiclassical approximation. The semiclassical equations will give a… (More)

We consider two quantum cosmological models with a massive scalar field: an ordinary Friedmann universe and a universe containing primordial black holes. For both models we discuss the complex… (More)

- Hawking, Arra L. Ross
- Physical review. D, Particles and fields
- 1995

A number of attempts have recently been made to extend the conjectured {ital S} duality of Yang-Mills theory to gravity. Central to these speculations has been the belief that electrically and… (More)

- Hawking
- Physical review. D, Particles and fields
- 1988

Any reasonable theory of quantum gravity will allow closed universes to branch off from our nearly flat region of spacetime. I describe the possible quantum states of these closed universes. They… (More)

It is argued that the observed thermodynamic arrow of time must arise from the boundary conditions of the Universe. We analyze the consequences of the no-boundary proposal, the only reasonably… (More)

- Hawking
- Physical review. D, Particles and fields
- 1996

One would expect spacetime to have a foam-like structure on the Planck scale with a very high topology. If spacetime is simply connected (which is assumed in this paper), the non-trivial homology… (More)

- Hawking, Arra L. Ross
- Physical review letters
- 1995

We discuss the pair creation of black holes by the breaking of a cosmic string. We obtain an instanton describing this process from the $C$ metric, and calculate its probability. This is very low for… (More)