docs(notes): add quantum mechanics entry

Author: lzwjava

notes/2025-05-25-quantum-mechanics-en.md

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+---
+title: Quantum Mechanics
+lang: en
+layout: post
+audio: false
+translated: false
+generated: true
+---
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+Quantum mechanics isn't nonsense, but it can feel that way because it defies our everyday intuition. It's a well-tested framework describing how particles like electrons and photons behave at tiny scales. Experiments, like the double-slit experiment, show particles can act like waves, exist in multiple states simultaneously (superposition), and influence each other instantly over distances (entanglement). These are weird, but they've been confirmed repeatedly since the 1920s.
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+The math—Schrödinger’s equation, Heisenberg’s uncertainty principle—predicts outcomes with stunning accuracy, underpinning tech like transistors and lasers. Critics, including Einstein, found it philosophically unsettling ("spooky action at a distance"), but no experiment has disproved it. Alternative theories, like Bohmian mechanics, exist but lack the same empirical support.
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+That said, interpretations (e.g., Copenhagen, Many Worlds) are debated, and we don’t fully grasp *why* it works this way. It’s not nonsense; it’s just a domain where human intuition struggles, and science hasn’t fully cracked the "meaning" behind the math. If you want to dig deeper into a specific aspect, like wave-particle duality or quantum computing, let me know.