The implementation of rotations

[DevelopDaily]

Here are two QASM files. I expect them to produce the same final states, but they don't. Could you please comment on them?

This file produces the correct state:

OPENQASM 2.0;
include "qelib1.inc";

qreg ctrl[1];
qreg q[1];

x ctrl[0];

h q[0];
rz((pi/4)+(pi/2)) q[0];

Its result is:

>> Final state:
0   0   0.707107   -0.5 + 0.5i

But, this file doesn't.

OPENQASM 2.0;
include "qelib1.inc";

qreg ctrl[1];
qreg q[1];

x ctrl[0];

ch ctrl[0], q[0];
crz((pi/4)+(pi/2)) ctrl[0], q[0];

Its result is:

>> Final state:
0   0   0.270598 - 0.653281i  0.270598 + 0.653281i

Well, it is almost correct -- the probabilities are correct. The phases of the state seem to be wrong.

The second file basically uses the ctrl[0] to control the other qubit. Since the ctrl[0] is 1, the two circuits should be deemed identical.

[vsoftco]

Thanks! Related to #70 , we ended up implementing rz as described in #70, but didn't do this for crz. will modify and document shortly

[vsoftco]

@DevelopDaily Fixed, please let me know if there are still problems with it.

[DevelopDaily]

Hooray! Like a charm.

Thanks.