Prof L. Diósi (Wigner research Center for Physics): Quantum control and semiclassical quantumgravity
Channel: Centrum Fizyki Teoretycznej PAN
Date: 10/05/2023

Prof Lajos Diósi (Wigner research Center for Physics & Eötvös Loránd University).
Quantum control and semiclassical quantumgravity.
Quantum gravity has not yet obtained a usable theory. We apply the semiclassical theory instead, where the space-time remains classical(i.e.: unquantized). However, the hybrid quantum-classical coupling is a causal, violates both the linearity of quantum theory and the Born rule as well. Such anomalies can go away if we modify the standard mean-field coupling, building on the mechanism of quantum measurement and feed-back well-known in, e.g., quantum optics. The Newtonian limit can fully be worked out, it leads to the gravity-related spontaneous wave function collapse theory of Penrose and the speaker.

‍Wednesday colloquium at CTP PAS – 2023-04-26