Forum: GNU Radio Re: Understand AM signal reception -- No Q component

In reference to the mail send for Josh Blum on March 25 2012, How we can
obtain 0 in the Q component when Im modulating in amplitude?, I 
understand
that carrier has a phase difference and like result the q component is 
not
zero. How to eliminate this phase difference?

Ideally :
I component -->  Ac(1+m(t))
Q component--> 0

Thanks.