Damped Perturbations in the No-Boundary State

被引：52

作者：

Dorronsoro, J. Diaz ^{[1
]}

Halliwell, J. J. ^{[2
]}

Hartle, J. B. ^{[3
]}

Hertog, T. ^{[1
]}

Janssen, O. ^{[4
]}

Vreys, Y. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Inst Theoret Phys, B-3001 Heverlee, Belgium

[2] Imperial Coll, Blackett Lab, London SW7 2BZ, England

[3] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[4] NYU, Ctr Cosmol & Particle Phys, New York, NY 10003 USA

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 08期

基金：

美国国家科学基金会; 欧洲研究理事会;

关键词：

STEEPEST-DESCENT CONTOURS; PATH-INTEGRAL APPROACH; QUANTUM COSMOLOGY; WAVE-FUNCTION; ORIGIN;

D O I：

10.1103/PhysRevLett.121.081302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We evaluate the no-boundary path integral exactly in a Bianchi type 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 nonlinear 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.

引用

页数：6

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