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Physics, 05.02.2020 10:49 deepspy599otchpd

Aparticle, initially (t -> 0) in the ground state of an infinite, 1d potential box with walls at r 0 and = a, is subjected at time t = 0 to a time-dependent perturbation v (r, t) et/7, with eo a small real number a) calculate to first order the probability of finding the particle in an excited state for t 0. consider all final states. are all possible transitions allowed? b) examine the time dependence of the problem: make a sketch and describe with words the behavior of the transition probability as a function of time induced by the perturbation c) calculate the probability that, after a sufficiently long time, the system will have made such a transition (i. e., analyze the limit t -> 00) d) how would the previous results you found in a)-c) change if the particle starts from the ground state in a 1d harmonic oscillator potential? be specific and justify your answers appropriately

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