M1L5e_CQ5.txt

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OK, so now the next question is-- again,
just to make sure you have the same basis, what
is now the variance?
If I measure the fluctuating current-- I
measure the current, I have a coherent state,
and I repeatedly measure the current,
it will show fluctuations.
And the question is what is not the standard deviation
of the current, what is the variance, which is