Unitarity in quantum cosmology: symmetries protected and violated
arXiv:1911.11839 · doi:10.1142/S0219887821500900
Abstract
This work deals with the violation or retention of symmetries associated with the self-adjoint extension of the Hamiltonian for homogeneous but anisotropic Bianchi I cosmological model. This extension is required to make sure the quantum evolution is unitary. It is found that the scale invariance is lost, but the Noether symmetries are preserved.
arXiv comment4 pages
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