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Experiments Spell Doom for Decades-Old Explanation of Quantum Weirdness
Physical-collapse theories have long offered a natural solution to the central mystery of the quantum world. But a series of increasingly precise experiments are making them untenable.
How Big Can the Quantum World Be? Physicists Probe the Limits.
By showing that even large objects can exhibit bizarre quantum behaviors, physicists hope to illuminate the mystery of quantum collapse, identify the quantum nature of gravity, and perhaps even make Schrödinger’s cat a reality.
A New Theorem Maps Out the Limits of Quantum Physics
The result highlights a fundamental tension: Either the rules of quantum mechanics don’t always apply, or at least one basic assumption about reality must be wrong.
Where Quantum Probability Comes From
There are many different ways to think about probability. Quantum mechanics embodies them all.
Mysterious Quantum Rule Reconstructed From Scratch
The new work promises to give researchers a better grip on the core mystery of quantum mechanics.
New Quantum Paradox Clarifies Where Our Views of Reality Go Wrong
The Frauchiger-Renner thought experiment has shaken up the world of quantum foundations.
Why the Many-Worlds Interpretation Has Many Problems
The idea that the universe splits into multiple realities with every measurement has become an increasingly popular proposed solution to the mysteries of quantum mechanics. But this “many-worlds interpretation” is incoherent, Philip Ball argues in this adapted excerpt from his new book Beyond Weird.
Famous Experiment Dooms Alternative to Quantum Weirdness
Oil droplets guided by “pilot waves” have failed to reproduce the results of the quantum double-slit experiment, crushing a century-old dream that there exists a single, concrete reality.
Closed Loophole Confirms the Unreality of the Quantum World
A quickly closed loophole has proved that the “great smoky dragon” of quantum mechanics may forever elude capture.