- #1

broegger

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I need to find <x> as a function of time using the Heisenberg picture. The problem is, how do I find an expression for |s>? My guess is to express p as p = (some constant)(a- - a+) (where a-/a+ are the ladder operators) and then:

|s> = exp(-i(some constant)(a- - a+)a)|0> = exp(-i(some constant)a)|1>.

But I know this is wrong... What am I supposed to do??