phy-4600/lecture_notes/1-22/Matrix Forms

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2016-02-12 17:26:39 +00:00
States can be represented as vectors
|Ψ> = ½|+> + (i√3)/2|-> = ½ ( 1 ) + (i√3)/2 ( 0 ) = ( 1/2 )
( 0 ) ( 1 ) ( (i√3)/2 )
Operators are matrices
Showed how Â|Ψ>=|φ> translates to a matrix in the z basis (pic x2)
Example with S𝓏 operator (pic)
Example with S𝓍 operator (pic)
Often we know operator but not basis. How to find basis? (pic)
i.e. find the eigen-basis S|α>=λ|α>
Only non-trivial if determinant is zero. Solve for basis. (pic)