Consider the states | w) = 9i 1) +21 2) and | x) = -1 41) +12), where the two vectors | ø1) and 2) are orthonormal. (a) Calculate the operators | w)(x | and | x)(w l. Are they equal?
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![1. Consider the states | w) = 9i | ø1) + 2 | $2) and | x) = - I ø1) +I 02), where the two vectors l ø1) and | ø2)
are orthonormal.
(a) Calculate the operators | w)(x | and | x)(w |. Are they equal?
(b) Find the Hermitian conjugates of w), I x), I w)(x 1, and | x)(w I.
2. Suppose the operators  and B are projection operators. Show that the sum of two projection operators
is a projection operator too when their product is zero.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F199160f3-dc94-4c2d-9039-dee348398d5b%2Fab6c0a75-c0b0-4fdd-8e85-0295cd26629a%2Feletw2i_processed.jpeg&w=3840&q=75)
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