This window opens if you press the **Generate Amplitudes...** button of
the **Node Prior-Info.** window when its focus node is a valid Qbit Rotator.
The window allows you to enter the angles theta[0], theta[1], theta[2] and
theta[3] (in degrees) such that the amplitudes of the node are given by the
entries of the following 2 × 2 matrix:

exp(i*(pi/180)*{theta[0] + theta[1]*sigmaX + theta[2]*sigmaY + theta[3]*sigmaY}),

where sigmaX, sigmaY and sigmaZ are the Pauli Matrices.

Even if the focus node is a Qbit Rotator, when you press the **Generate
Amplitudes...** button, the computer will refuse to open the above window
unless:

- the focus node has exactly one parent node,
- the parent node has 2 states, 0 and 1, in that order.

Quantum Fog gives names 0 and 1 to the states of the Qbit Rotator.

More information about Qbit Rotators can be found in the document entitled "Quantum Fog Library Of Essays" that accompanies this manual.