Question: quantum system is described by the Hamiltonian H + , where ( are Pauli matrices, and are positive constants ( and = 0 for 0

quantum system is described by the Hamiltonian H+, where ( are Pauli matrices, and are positive constants ( and =0 for 0for 0<0 for At 0, the system is in the ground state. The probability of finding the system in the excited state at in the leading order in is

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