The Avoidance of the Little Sibling of the Big Rip Abrupt Event by a Quantum Approach

被引：6

作者：

Albarran, Imanol ^{[1
,2
]}

Bouhmadi-Lopez, Mariam ^{[3
,4
]}

Cabral, Franciso ^{[5
]}

Martin-Moruno, Prado ^{[6
,7
]}

机构：

[1] Univ Beira Interior, Dept Fis, Rua Marques DAvila & Bolama, P-6200001 Covilha, Portugal

[2] Univ Beira Interior, Ctr Matemat & Aplicacoes, Rua Marques DAvila & Bolama, P-6200001 Covilha, Portugal

[3] Univ Basque Country, UPV EHU, Dept Theoret Phys, POB 644, Bilbao 48080, Spain

[4] Basque Fdn Sci, Ikerbasque, Bilbao 48011, Spain

[5] Univ Lisbon, Fac Ciencias, Inst Astrofis & Ciencias Espaco, Edificio C8, P-1749016 Lisbon, Portugal

[6] Univ Complutense Madrid, Dept Fis Teor, E-28040 Madrid, Spain

[7] Univ Complutense Madrid, UPARCOS, E-28040 Madrid, Spain

来源：

GALAXIES | 2018年 / 6卷 / 01期

关键词：

dark energy; cosmological singularities; quantum cosmology;

D O I：

10.3390/galaxies6010021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We address the quantisation of a model that induces the Little Sibling of the Big Rip (LSBR) abrupt event, where the dark energy content is described by means of a phantom-like fluid or a phantom scalar field. The quantisation is done in the framework of the Wheeler-DeWitt (WDW) equation and imposing the DeWitt boundary condition; i.e., the wave function vanishes close to the abrupt event. We analyse the WDW equation within two descriptions: First, when the dark energy content is described with a perfect fluid. This leaves the problem with the scale factor as the single degree of freedom. Second, when the dark energy content is described with a phantom scalar field in such a way that an additional degree of freedom is incorporated. Here, we have applied the Born-Oppenheimer (BO) approximation in order to simplify the WDW equation. In all cases, the obtained wave function vanishes when the LSBR takes place, thus fulfilling the DeWitt boundary condition.

引用

页数：13

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