Clocks and Trajectories in Quantum Cosmology

We consider a simple cosmological model consisting of an empty Bianchi I Universe, whose Hamiltonian we deparametrise to provide natural clock variable. The thus effectively describes isotropic universe with induced given by the shear. By quantising this model, obtain various different possible bouncing trajectories (semiquantum expectation values on coherent states or obtained de Broglie–Bohm formulation) and explicit their dependence, specifically emphasising question symmetry across bounce.