Description |
It has been suggested that the collapse of the wave function during a quantum
measurement is possibly dynamical and can be explained by slightly modifying the
Schroedinger equation. Such modifications were made by Ghirardi, Rimini and Pearle in
their GRW and CSL models by putting non-linear and stochastic terms in the Schroedinger
equation. Stochasticity is necessary for a random collapse of the wavefunction. Another
approach to introduce stochasticity is to say that it is a consequence of intrinsic fluctuations
in the geometry of spacetime itself. Two different models have been proposed along this
line by Karolyhazy and Diosi. In this talk I will discuss how fluctuating gravity can play a role
in the wavefunction collapse mechanism where I will compare these two well-known
models. I will also analyse whether such models are complete in understanding or lack some
deeper physics.
Gravity induced collapse and other modified quantum theories such as CSL result in a tiny
non-conservation of energy and momentum. This introduces a random motion similar to the
Brownian motion which can, in principle, be tested in laboratory under low temperature
and pressure. Following a previous work by Collett and Pearle, I will describe how these
random motions generated by CSL as well as gravity models give rise to detectable
translational / rotational motion.
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