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Damped perturbations in the no-boundary state · Around

2018

Damped perturbations in the no-boundary state

Dorronsoro, Juan Diaz, Halliwell, Jonathan J., Hartle, James B. et al.

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We evaluate the no-boundary path integral exactly in a Bianchi IX minisuperspace with two scale factors.

In this model the no-boundary proposal can be implemented by requiring one scale factor to be zero initially together with a judiciously chosen regularity condition on the momentum conjugate to the second scale factor.
Taking into account the non-linear backreaction of the perturbations we recover the predictions of the original semiclassical no-boundary proposal.
In particular we find that large perturbations are strongly damped, consistent with vacuum state wave functions.

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J. B. Hartle
1983
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K. Kuchar
1983
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S. W. Hawking
1984
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S. W. Hawking
1984
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J. J. Halliwell
1985
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1985
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1985
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1989
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J. J. Halliwell
1989
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J. J. Halliwell
1990
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