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Topic: Expectation value , <x+y> for particle in a 2D box?  (Read 2412 times)

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Offline Mr.A

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Expectation value , <x+y> for particle in a 2D box?
« on: June 27, 2015, 11:20:07 PM »
What does <x+y>  operator means? Do i have to calculate the average values for both x and y coordinates and add em up ? Or double integrate the wave function (2D) by x and y? Like we do for energy? Thanks.
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Offline Corribus

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Re: Expectation value , <x+y> for particle in a 2D box?
« Reply #1 on: June 28, 2015, 02:28:09 AM »
Quote from: Mr.A on June 27, 2015, 11:20:07 PM
Do i have to calculate the average values for both x and y coordinates and add em up ?
Well, does it make sense that <x+y> is the same as <x>+<y>?
You should be able to show this fairly simply.  What is the definition of the expectation value for an operator?
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What men are poets who can speak of Jupiter if he were like a man, but if he is an immense spinning sphere of methane and ammonia must be silent?  - Richard P. Feynman
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