- #1
Vilashjorthen
- 1
- 0
Homework Statement
This problem is about the 1-dimensional harmonic oscillator.
The normalized energy levels are labeled |n>, n=0,1,2...
Two operators are given by
[itex]\widehat{A}[/itex] = [itex]\alpha[/itex] ([itex]\widehat{a}[/itex]++[itex]\widehat{a}[/itex]-)
[itex]\widehat{B}[/itex] = i[itex]\beta (\widehat{a}[/itex]+2+[itex]\widehat{a}[/itex]-2)
where [itex]\alpha[/itex] and [itex]\beta[/itex] are real numbers and [itex]\widehat{a}[/itex]+ and [itex]\widehat{a}[/itex]+ are the step up and step down operators
Calculate [itex]\widehat{A}[/itex]|n> and [itex]\widehat{B}[/itex]|n>
Homework Equations
[itex]\widehat{a}[/itex]+|n> = √(n+1)|n+1>
[itex]\widehat{a}[/itex]-|n> = √(n)|n-1>
The Attempt at a Solution
I have inserted the above equations and got an answer for [itex]\widehat{A}[/itex]|n> (although I am not sure if it is sufficient):
[itex]\widehat{A}[/itex]|n>=[itex]\alpha[/itex] (√(n+1)|n+1> + √(n)|n-1>)
But with [itex]\widehat{B}[/itex]|n> I am stuck at
[itex]\widehat{B}[/itex]|n>= i[itex]\beta (\widehat{a}[/itex]+√(n+1)|n+1> - [itex]\widehat{a}[/itex]-√(n)|n-1>)
Any help will be much appreciated. Thank you in advance.
P.S.: This is my first post, so please let me know if I have posted something "the wrong way".