This is in continuation to my previous question. It is not a duplicate of the pr

Question

This is in continuation to my previous question. It is not a duplicate of the previous one. This question arises because of the answers and discussions in that question.

Can we call a theory, quantum theory, if it is consistent with HUP? For example, suppose there is a finite and self consistent theory of gravity which incorporates the uncertainty principle. Can we at once call this theory a quantum theory of gravity or does it have to satisfy other conditions too?

This question may be too basic but it is intriguing my mind

Explanation / Answer

A quantum theory is a theory that obeys the postulates of quantum mechanics, see e.g.

http://en.wikipedia.org/wiki/Postulates_of_quantum_mechanics#Postulates_of_quantum_mechanics

One may choose a slightly different wording of the conditions, add some detailed ones or unify the conditions above to a smaller list, but it must always be effectively the same thing. There are no exceptions from this definition. In particular, a theory of quantum gravity is a theory predicting gravity that is compatible with the postulates of quantum mechanics. (We usually want a theory of quantum gravity to be compatible with the principles of relativity, too.)

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