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Posted by Trond Andersen and Yuri Lensky, Research Scientists, Google Quantum AI Team Imagine you’re shown two identical objects and then asked to close your eyes. When you open your eyes, you see the same two objects in the same position. How can you determine if they have been swapped back and forth? Intuition and the laws of quantum mechanics agree: If the objects are truly identical, there is no way to tell. While this sounds like common sense, it only applies to our familiar three-d...