RT Journal Article
T1 Hybrid models in loop quantum cosmology
A1 Elizaga Navascués, Beatriz
A1 Martín Benito, Mercedes
A1 Mena Marugán, Guillermo Antonio
AB In the framework of Loop Quantum Cosmology (LQC), inhomogeneous models are usually quantized by means of a hybrid approach that combines loop quantization techniques with standard quantum field theory methods. This approach is based on a splitting of the phase space in a homogeneous sector, formed by global, zero-modes and an inhomogeneous sector, formed by the remaining, infinite number of modes, that describe the local degrees of freedom. Then, the hybrid quantization is attained by adopting a loop representation for the homogeneous gravitational sector, while a Fock representation is used for the inhomogeneities. The zero-mode of the Hamiltonian constraint operator couples the homogeneous and inhomogeneous sectors. The hybrid approach, therefore, is expected to provide a suitable quantum theory in regimes where the main quantum effects of the geometry are those affecting the zero-modes, while the inhomogeneities, still being quantum, can be treated in a more conventional way. This hybrid strategy was first proposed for the simplest cosmological midisuperspaces: the Gowdy models, and it has been later applied to the case of cosmological perturbations. This paper reviews the construction and main applications of hybrid LQC.
PB World Scientific Publishing
SN 0218-2718
YR 2016
FD 2016
LK https://hdl.handle.net/20.500.14352/98765.2
UL https://hdl.handle.net/20.500.14352/98765.2
LA eng
NO Está depositado el preprint del artículo
NO Ministerio de Economía y Competitividad (España)
NO Ministerio de Ciencia e Innovación (España)
NO Netherlands Organisation for Scientific Research
DS Docta Complutense
RD 6 abr 2025