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gr-qc2019
Construction of quantum Dirac observables and the emergence of WKB time
Leonardo Chataignier
We describe a method of construction of gauge-invariant operators (Dirac observables or ``evolving constants of motion'') from the knowledge of the eigenstates of the gauge generat…
gr-qc2019
Gauge Fixing and the Semiclassical Interpretation of Quantum Cosmology
Leonardo Chataignier
We make a critical review of the semiclassical interpretation of quantum cosmology and emphasise that it is not necessary to consider that a concept of time emerges only when the g…