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Consider a two-state quantum system with a Hamiltonian
Another physical observable is described by the operator
where is real and positive. Let the initial state of the system be , where is the eigenstate corresponding to the larger of the two possible eigenvalues of . What is the frequency of oscillation (i.e., the Bohr frequency) of the expectation value of ?
In this problem, we are given a two-state system with a Hamiltonian
Let's consider an observable given as
If the system is in the state we want to know the Bohr frequency of the expectation value of A.
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