Quantum entanglement typically requires direct quantum contact. But physicists have shown that two spins can become entangled through an ordinary spring pendulum—a classical object without quantum properties. This discovery means: even if gravity remains classical, it can bind particles with an invisible quantum bond.
🎯 Entanglement is measured via entropy—a measure of disorder. In the spring system, this entropy increased just as it would if the mediator were quantum. The classical spring performed just as well as the most perfect quantum channel.