Quantum control and semiclassical quantum gravity
by Lajos Diósi (MTA Wigner RCP)
Friday, November 23th, 2018 from 14:00 (Europe/Budapest)
at KFKI campus ( Bldg.3. Conference Room )
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 acausal, 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.