1. ## Unitary operator

Hey guys.

http://img397.imageshack.us/img397/7987/scan0001q.jpg

I have this operator and I need to check if it's Unitary.
I checked the "length of vector preservation test" as you can see in the pic and I came up with that, that it does not keep the length of a vector.
Does that mean that it's not a Unitary operator?

Thanks.

2. Originally Posted by asi123
Hey guys.

http://img397.imageshack.us/img397/7987/scan0001q.jpg

I have this operator and I need to check if it's Unitary.
I checked the "length of vector preservation test" as you can see in the pic and I came up with that, that it does not keep the length of a vector.
Does that mean that it's not a Unitary operator?

Thanks.
Check the definition of "norm" for complex vectors... And try again!