According to the Many-Worlds Interpretation (MWI) of quantum mechanics, each quantum measurement outcome leads to the branching of the universe into multiple parallel worlds or "branches." These branches represent different possible outcomes of the measurement, and they evolve independently, following the laws of quantum mechanics.
In the MWI, the different branches do not interact or communicate with each other. Each branch represents a distinct and separate reality with its own set of particles, states, and events. Therefore, there is no direct communication between these parallel worlds in the traditional sense.
Entanglement, which is a fundamental aspect of quantum mechanics, describes the correlation between quantum systems. However, entanglement occurs within a single world or branch and does not bridge the gap between different branches in the MWI.
It's important to note that the Many-Worlds Interpretation is just one of several interpretations of quantum mechanics, and there is ongoing debate and discussion among physicists regarding its implications and validity. While the MWI provides a consistent and mathematically sound framework, it is still a theoretical interpretation, and its direct experimental verification remains a challenge.