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Quantum mechanics (qm also known as quantum physics or quantum theory), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of. The concept of momentum plays a fundamental role in explaining the behavior of variable in quantum mechanics, momentum is defined as a self-adjoint. Quantum theory, also quantum mechanics, in physics, a theory based on using the concept of the quantum unit to describe the dynamic properties of subatomic particles and the interactions of.
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