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noblegas
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Homework Statement
Suppose the operators P and Q satisfy the commutation relation
[P,Q]=a, where a is a constant(a number, not an operator).
a)Reduced the commutator
[P,Q^n] where Q^n means the product of n Qs, to the simplest possible form.
b) Reduce the commutator
[P,e^iQ] to the simplest form.(The operator function e^iQ is defined by the equation, U*[tex]\varphi[/tex]=[tex]\sum[/tex](iQ)^n/(n!), U=e^iQ
Homework Equations
The Attempt at a Solution
a) do they want me to reduced both of my commutation relations to constant like the constant a? [P,Q^n]=d/dx*(P*Q^n-Q^n*P)*phi =0? zero is a constant.
b) [P, e^iQ]=d/dx*(P*e^iQ-e^iQ*P)*phi