- #1
iScience
- 466
- 5
so I'm fine with the kets, e.g, |a>.. but i don't understand what the bras are. the kets are basically just a column vector right? ie the components (with the direction) of the vector being described.
but what is the bra?
this was given to us in class:
<a|=a1<e1|+a2<e2|= (a1* a2*)
(where e1 and e2 are the unit basis vectors)
but why the complex conjugates? where'd they come from?
and the professor gave us this in class:
<a|b>=a1*b1<e1|e1>+a1*b2<e1|e2>+a2*b1<e2|e1>+a2*b2<e2|e2>
i understand the pattern but i am still at a loss as to where this all came from
but what is the bra?
this was given to us in class:
<a|=a1<e1|+a2<e2|= (a1* a2*)
(where e1 and e2 are the unit basis vectors)
but why the complex conjugates? where'd they come from?
and the professor gave us this in class:
<a|b>=a1*b1<e1|e1>+a1*b2<e1|e2>+a2*b1<e2|e1>+a2*b2<e2|e2>
i understand the pattern but i am still at a loss as to where this all came from