Bonn 2020 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 10: Quantum Gravity and Quantum Cosmology 1

GR 10.5: Talk

Wednesday, April 1, 2020, 17:30–17:45, H-HS IX

Towards a classical correspondence of wave packets in quantum cosmology — Chen Lan¹, •Yi-Fan Wang², and Yan-Gang Miao¹ — ¹School of Physics, Nankai University, Tianjin 300071, China — ²Institut für Theoretische Physik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany

In Wheeler–DeWitt quantum cosmology, a classical universe can emerge from a realistic wave function at a suitable scale. It has been argued that such wave functions are strongly peaked around classical solutions; in other words, the ridgeline of a physical wave packet corresponds to a classical solution.

We give quantitative descriptions of the ridge-line of a wave packet. With explicit examples of wave packets, it is shown that ridgelines can deviate from classical trajectories at classical scales. Possible interpretations are discussed.