Quantum Mechanics. The Theoretical Minimum -

I looked at the coffee mug on the table. It was full. It was empty. It was a ceramic shard embedded in the drywall. According to the notebook, these weren’t three different mugs. It was one "state," a complex superposition of possibilities. I reached for the handle. My hand passed through the steam of the full cup and gripped the cold porcelain of the empty one.

The universe, as Feynman once said, is better enjoyed when you don't insist on understanding it. The Theoretical Minimum | Quantum mechanics. The theoretical minimum

When I finally opened my eyes, the world was singular again. The mug was just a mug. The door was just a door. But as I walked to my car, I didn't check the rearview mirror. I knew better than to look too closely at where I’d just been. I looked at the coffee mug on the table

"Don't look too hard," I whispered to myself. In quantum mechanics, the act of looking—the measurement problem —is what forces the universe to pick a side. It was a ceramic shard embedded in the drywall

I flipped to the chapter on Entanglement . Art’s notes were messy here. “Two systems, once joined, are never truly separate,” he’d written. I realized my wedding ring—the twin to the one Art was wearing when the reactor flared—was humming. We were entangled .

This request appears to be inspired by the book Quantum Mechanics: The Theoretical Minimum by Leonard Susskind and Art Friedman.