+A7a refers to an elusive [quantum state](/wiki/quantum_state), momentarily observed under specific, extreme conditions. Its fleeting presence offers a glimpse into fundamental aspects of [particle physics](/wiki/particle_physics).
+## See also
+- [Quantum Mechanics](/wiki/quantum_mechanics)
+- [Elementary Particle](/wiki/elementary_particle)
+- [Wave-Particle Duality](/wiki/wave-particle_duality)
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