https://doi.org/10.1140/epjc/s10052-016-4373-5
Regular Article - Theoretical Physics
Classical universe emerging from quantum cosmology without horizon and flatness problems
1
Department of Physics, Shahid Beheshti University, G. C., Evin, Tehran, Iran
2
Centro de Matemática e Aplicações-UBI, Covilhã, Portugal
3
Departmento de Física, Universidade da Beira Interior, 6200 , Covilhã, Portugal
* e-mail: s-jalalzadeh@sbu.ac.ir
Received:
16
May
2016
Accepted:
14
September
2016
Published online:
27
September
2016
We apply the complex de Broglie–Bohm formulation of quantum mechanics in Chou and Wyatt (Phys Rev A 76: 012115, 2007), Gozzi (Phys Lett B 165: 351, 1985), Bhalla et al. (Am J Phys 65: 1187, 1997) to a spatially closed homogeneous and isotropic early universe whose matter contents are radiation and dust perfect fluids. We then show that an expanding classical universe can emerge from an oscillating (with complex scale factor) quantum universe without singularity. Furthermore, the universe obtained in this process has no horizon or flatness problems.
© The Author(s), 2016
