In some interpretations of quantum mechanics, such as the Many-Worlds interpretation or the Pilot Wave Theory, parallel universes may form every time a subatomic particle goes through any interaction.
But do such parallel worlds exist?
But these interpretations have never been shown to be correct, and they have some major weaknesses that prevent them from being widely accepted.The problem of measurementQuantum mechanics is the physics framework that describes the behavior of tiny particles. One quirk of this theory is that no one is sure what results they get until they look. For example, the canonical interpretation of the physics theory says that electrons exist in multiple states at once.
However, this standard picture runs into a problem when scientists actually make a measurement. When they're not looking, the wavefunction evolves on its own according to the Schrödinger equation. No big deal. But when scientists make a measurement, this wavefunction"collapses", essentially disappearing, with the particle appearing at one of the possible locations.
When particles interact, their wavefunctions briefly overlap. In quantum mechanics, once this happens those particles are forever linked: a single wavefunction describes both particles simultaneously, a process known as"quantum entanglement." When scientists make a measurement, they are just triggering a series of entanglements beginning with the particle hitting a detector, and ending with molecules shifting around in their brains to make them consciously aware of what just happened.
This process creates a quantum multiverse. Because essentially every interaction is at some level a quantum interaction, there are universes containing every possible alternative choice you could have made in your entire life. In fact, you are being constantly split at this very moment, fragmenting and splitting into multiple copies of you with every choice, every movement, and every action.
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