Quantum control and semiclassical quantumgravity




Wigner research Center for Physics & Eötvös Loránd University

April 26, 2023 12:30 PM

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.

Onsite: Room D, the Institute of Physics PAS, Al. Lotników 32/46

Zoom: https://zoom.us/j/82380380442?pwd=Z3IyeEhlZmFHU1B2M2VUVVJhODkrUT09 (Passcode: 134595, Meeting ID: 823 8038 0442,