Build a pendulum small enough, and it will violate Newton's classical laws of mechanics, following quantum rules instead. Some researchers hope to observe such violations by cooling a tiny wobbling object to very low temperatures. A team of theorists has now analyzed a vibrating bar, both classically and quantum mechanically, and predicted the signatures of quantum behavior that experimenters might observe. What's more, the team found that such a classical-to-quantum transition is within reach of current technology. They hope that experiments on small moving objects will soon shed light on a deep question: why do large objects obey classical laws?
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