Subsequent measurement of energy

Asked Dec 28 '20 at 17:44

Active Dec 28 '20 at 18:46

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I am interested in the subsequent measurement of energy, like assume the energy of the electron was measured to be $E_1$ and the wavefunction of the electron is described by a finite superposition of eigenfunction of energy. After the first measurement will the subsequent measurement have the same energy measurement which is $E_1$.

I think this question has been asked multiple times, but what I am confused about is that if all the subsequent measurement was of state $E_1$ that means that the uncertainty in energy is zero, which implies that the uncertainty in time measurement has to be infinite.

edited Dec 28 '20 at 18:46

Qmechanic

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asked Dec 28 '20 at 17:44

rashed a564

Thanks so it's like 0/0 – rashed a564 Dec 28 '20 at 19:26
For typical energy measurement. the time duration delta t is rather long. A macrospcopic time can be viewed as microscopic infinite time. Since the delta t is infinity, delta E can be quite accurated. – ytlu Dec 28 '20 at 19:32
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Does this answer your question? Basic quantum mechanics- violation of the time-energy uncertainty principle by pure eigenstates of the infinite potential well? – Nihar Karve Dec 29 '20 at 01:49

Subsequent measurement of energy

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