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Magnetic field Hamiltonian in different basis
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[QUOTE="vela, post: 5530312, member: 221963"] To express the Hamiltonian in matrix form, you have to first choose a basis. The matrix you wrote down (in terms of [B]B[/B]) is written with respect to the basis consisting of eigenstates of ##\sigma_z##. The problem seems to be asking you to express ##\hat H## in terms of the eigenstates of ##\sigma_x## instead, and then compare it to the qubit matrix and identify the corresponding values of ##\varepsilon## and ##t##. [/QUOTE]
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Magnetic field Hamiltonian in different basis
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