### Resumen

A simple idea of relating the loop quantum gravity (LQG) and loop quantum cosmology (LQC) degrees of freedom is introduced and used to define a relatively robust interface between these theories in context of toroidal Bianchi I model. The idea is an expansion of the construction originally introduced by Ashtekar and Wilson-Ewing and relies on explicit averaging of a certain subclass of spin networks over the subgroup of the diffeomorphisms remaining after the gauge fixing used in homogeneous LQC. It is based on the set of clearly defined principles and thus is a convenient tool to control the emergence and behavior of the cosmological degrees of freedom in studies of dynamics in canonical LQG. The constructed interface is further adapted to isotropic spacetimes. Relating the proposed LQG-LQC interface with some results on black hole entropy suggests a modification to the area gap value currently used in LQC.

Idioma original | English |
---|---|

Número de artículo | 124020 |

Publicación | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volumen | 92 |

N.º | 12 |

DOI | |

Estado | Published - 10 dic 2015 |

Publicado de forma externa | Sí |

### Huella dactilar

### ASJC Scopus subject areas

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

### Citar esto

*Physical Review D - Particles, Fields, Gravitation and Cosmology*,

*92*(12), [124020]. https://doi.org/10.1103/PhysRevD.92.124020

}

*Physical Review D - Particles, Fields, Gravitation and Cosmology*, vol. 92, n.º 12, 124020. https://doi.org/10.1103/PhysRevD.92.124020

**Observations on interfacing loop quantum gravity with cosmology.** / Pawłowski, Tomasz.

Resultado de la investigación: Article

TY - JOUR

T1 - Observations on interfacing loop quantum gravity with cosmology

AU - Pawłowski, Tomasz

PY - 2015/12/10

Y1 - 2015/12/10

N2 - A simple idea of relating the loop quantum gravity (LQG) and loop quantum cosmology (LQC) degrees of freedom is introduced and used to define a relatively robust interface between these theories in context of toroidal Bianchi I model. The idea is an expansion of the construction originally introduced by Ashtekar and Wilson-Ewing and relies on explicit averaging of a certain subclass of spin networks over the subgroup of the diffeomorphisms remaining after the gauge fixing used in homogeneous LQC. It is based on the set of clearly defined principles and thus is a convenient tool to control the emergence and behavior of the cosmological degrees of freedom in studies of dynamics in canonical LQG. The constructed interface is further adapted to isotropic spacetimes. Relating the proposed LQG-LQC interface with some results on black hole entropy suggests a modification to the area gap value currently used in LQC.

AB - A simple idea of relating the loop quantum gravity (LQG) and loop quantum cosmology (LQC) degrees of freedom is introduced and used to define a relatively robust interface between these theories in context of toroidal Bianchi I model. The idea is an expansion of the construction originally introduced by Ashtekar and Wilson-Ewing and relies on explicit averaging of a certain subclass of spin networks over the subgroup of the diffeomorphisms remaining after the gauge fixing used in homogeneous LQC. It is based on the set of clearly defined principles and thus is a convenient tool to control the emergence and behavior of the cosmological degrees of freedom in studies of dynamics in canonical LQG. The constructed interface is further adapted to isotropic spacetimes. Relating the proposed LQG-LQC interface with some results on black hole entropy suggests a modification to the area gap value currently used in LQC.

UR - http://www.scopus.com/inward/record.url?scp=84952332406&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.92.124020

DO - 10.1103/PhysRevD.92.124020

M3 - Article

AN - SCOPUS:84952332406

VL - 92

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 12

M1 - 124020

ER -