New Theory Solves Paradox of Schrödinger's Cat by Claiming We're in a Multiverse

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In 1935, a renowned physicist, Erwin Schrödinger, who was born in Austria, proposed a thought experiment that dramatically highlighted a major issue within the fundamental principles of quantum mechanics.

The issue persists and can be summed up by Schrödinger's rather unreasonable idea of a cat being in a state of existence and nonexistence at the same time.

Ocurrences of quantum systems always appear in a single state after they're observed.

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Particles in an existing landscape pull Schrödinger's cat out of its own equilibrium, decidedly dead or alive, with no middle ground.

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While wave functions that describe combinations of particle states determine a range of possible outcomes on paper, in reality, these particles remain in a definite state even when no one is observing them.

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One way to understand the distinction between different realities is to picture every possible state of a particle as its own unique universe, each with its own distinct reality. Among these many potential universes, only one becomes the one we experience when its possibilities line up with our own reality's established path.

In the team's numerical demonstration, the sheer scale of interactions grows and builds so quickly that it drastically limits the possibilities, eventually leaving behind only a few single options remaining.

In other words, considering the vastness of the universe surrounding Schrödinger's cat – including the box, the observers, the building that houses them, and everything beyond – the rapidly increasing interactions between the environment and the cat's alive and dead states over time mean that the two states won't appear as a mixture.

Actually, this fusion occurs on a very tiny scale, happening almost instantly, so it's mainly a few particles that are able to quickly clear up the fuzziness of an undecided state, making the quantum uncertainty all but disappear on the smallest scales.

in their paper.

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It may still be possible to imagine a combination of entangled states yielding a mixture of living and dead cat, and this possibility has not been scientifically disproven. Additionally, there remains the question of how effectively quantum randomness can impact macroscopic reality, which is our everyday existence.

Theoretical physicists have proposed that incorporating larger-scale views of current situations will help clarify why an uncertain quantum haze suddenly focuses on a single observation.

Schrödinger's cat will continue to be a mysterious phenomenon in physics for some time to come, turning in its grave as a symbol of a field of study that has a lot of untapped potential.

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