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Expectation value of an operator in matrix quantum mechanics

  • Thread starter Dixanadu
  • Start date
  • #1
254
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Homework Statement


Hey everyone.
Imma type this up in Word as usual:

http://imageshack.com/a/img577/3654/q9ey.jpg [Broken]

Homework Equations



http://imageshack.com/a/img22/3185/pfre.jpg [Broken]

The Attempt at a Solution


http://imageshack.com/a/img703/8571/xogb.jpg [Broken]
 
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Answers and Replies

  • #2
vanhees71
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There's a mistake in the last step. You've overlooked the imaginary units in the exponentials!
 
  • #3
254
2
Ohhh yea it isnt [itex]cosh[/itex], it should be [itex]cos[/itex]...but is the rest okay? I mean the matrix U and stuff?
 

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