I read in an article that "Quantum physics is a highly mathematical theory that describes the nature of reality at the atomic and subatomic level". I also read another article that says quantum physics does not tell anything about reality. Can you give me some context about it in a way that is...
I was working on plotting fidelity with time for two quantum states. First I used discrete time( t= 0,1,2,3...etc) to plot my fidelity. I got constant fidelity as 1 with continuous value of time. Next I used discrete set of values ( t=0 °,30 °,60 °,90 °). Here I saw my fidelity decreases and...
While increasing the degree( 0,30,60,etc) fidelity keeps on decreasing and reaches 0 (1,0.2,0,0,0...). So can I conclude that overlapping of the two quantum state decreases while increasing the degree(time)?
But if take smaller values of alpha, I am not getting this statement. Why? For example; take alpha= sqrt{1}. Its inner product is 0.36 and fidelity is 0.1
@Demystifier I am wrong. What my teacher meant was "At t = 90(degree), the fidelity is 0.00004 which is nearly equal to 0. But fidelity will be 0 only if the two states are orthogonal. But my case is not orthogonal. So he told me my calculation is wrong". I think it makes sense right?
Therefore...
Is there something wrong with my initial and final state?
"The fidelity between two states can be shown to never decrease when a non-selective quantum operation is applied to the states" what does this mean and how is it related to my problem?