Could the Many Worlds interpretation mean you are technically immortal?
This video explores the concept of quantum immortality, a thought experiment derived from Schrödinger's cat. It examines whether the Many Worlds interpretation of quantum mechanics implies that a version of you survives in some branch of reality regardless of the odds.
The Many Worlds interpretation suggests that reality splits into multiple, equally valid branches whenever a quantum measurement occurs. While the Copenhagen interpretation posits that unobserved branches vanish upon measurement, Many Worlds argues these branches persist, rendered inaccessible to us through decoherence. Because we exist within one specific branch, we only experience that singular reality.
Quantum immortality is a theoretical test of this framework. It asks whether, if reality multiplies in every possible way, there might always be a version of an observer that continues to exist, effectively surviving events that would otherwise be fatal. While the presenter notes this test is not practically useful, it serves as a provocative way to consider the implications of a branching multiverse.
