David Deutsch, a prominent physicist and proponent of the many-worlds interpretation of quantum mechanics, responded to Einstein's famous quote, "God does not play dice," with a different perspective. While Einstein used this phrase to express his skepticism about the probabilistic nature of quantum mechanics, Deutsch's view aligns with the idea that quantum mechanics does involve inherent randomness.
Deutsch argued that Einstein's objection to the probabilistic nature of quantum mechanics was based on a misunderstanding of the theory. According to the many-worlds interpretation, every possible outcome of a quantum event actually occurs in different branches of reality. In other words, when a quantum event takes place, the universe splits into multiple parallel universes, each corresponding to a different outcome.
From Deutsch's perspective, the probabilistic nature of quantum mechanics arises from our inability to know which branch of reality we are in. It is not a reflection of randomness or unpredictability within a single universe but rather a consequence of our limited knowledge of the entire multiverse.
Therefore, Deutsch would argue that God, or the fundamental nature of reality, does "play dice" in the sense that quantum events have inherent probabilities. However, this probabilistic behavior is a result of the multiverse's structure rather than being a manifestation of true randomness within a single universe.
It's worth noting that the many-worlds interpretation is just one of several interpretations of quantum mechanics, and there is ongoing debate and discussion among physicists about the nature of quantum reality. Einstein himself did not fully accept the many-worlds interpretation and continued to seek a more deterministic explanation for quantum phenomena until the end of his life.