How can we test whether gravity is quantum?
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Physicists have competing ideas about what quantum gravity is, but have not yet conclusively decided whether the gravity we experience is quantum at all. . A new proposal offers a way to refute or affirm this by observing whether the state of a quantum object is affected when gravity is measured.
Physicists have repeatedly shown that small objects are affected by quantum effects, but the same is true for large objects whose behavior is strongly influenced by gravity (black holes being the most extreme example)…
