Recent content by Alexandr

Guys, I'm stuck with a simple and stupid question... We have a spin "up" and "down" as a qubit 1 and 0 states. Now can we consider a state perpendicular to this basis direction as a (0+1)/sqrt(2) state? If not then what is the sense of the phase shift x in the state (0+exp(ix)1)/sqrt(2)?

Please, people, need help! I have a harmonic function which is a product of cosines (something with many cos(k*phi)) and it can be represented as a finite series with only cos terms... We know it... Now. Every step we multiply this function by one more cos and want to find the Fourier...