An amplitude is not a complex number. It is the real number one gets taking the ... | Hacker News

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		DonGateley on Aug 26, 2015 \| parent \| context \| favorite \| on: A new Stephen Hawking presentation about black hol... An amplitude is not a complex number. It is the real number one gets taking the root of the sum of the squares of the real and imaginary part of a complex number. In QM they will be between 0 and 1 and are probabilities.

davorak on Aug 26, 2015 | [–]

From memory of quantum class the amplitude is a complex number and are not directly probabilities:

Most convenient reference:

> In quantum mechanics, a probability amplitude is a complex number ...

https://en.wikipedia.org/wiki/Probability_amplitude#A_basic_...

loup-vaillant on Aug 26, 2015 | [–]

No matter, that's still a physical quantity. Probability is in the mind.

http://lesswrong.com/lw/oj/probability_is_in_the_mind/

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