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If we measure S, at time t, what are the probabilities of finding +/?

If we measure S, at time t, what are the probabilities of finding +/?

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Example 8.4.1: Quantum Mechanics
Example 8.4.1: Consider a spin particle at rest in a uniform magnetic field pointing in the +z direction. It is initially in the spin state X at time t = 0. (a) What will be the state at 296 Fundamentals of Quantum Mechanics some later time t? (b) If we measure S, at time t, what are the probabilities of finding ±½? (c) What are the probabilities of finding ±12, if we measure S₂ at time t?
Transcribed Image Text:Example 8.4.1: Consider a spin particle at rest in a uniform magnetic field pointing in the +z direction. It is initially in the spin state X at time t = 0. (a) What will be the state at 296 Fundamentals of Quantum Mechanics some later time t? (b) If we measure S, at time t, what are the probabilities of finding ±½? (c) What are the probabilities of finding ±12, if we measure S₂ at time t?
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