What is the Bloch sphere representation useful for?

[mtak0114]

Hi
could someone please explain the what the bloch sphere representation of a quantum state is useful for?

thanks

Mark

 

[Naty1]

Try wiki at http://en.wikipedia.org/wiki/Bloch_sphere

 

[mtak0114]

Hi... I already had a look at this article...
I get that it provides a geometrical representation
of a state but is that the extent of its usefulness?

cheers

Mark