Explore · Math
Complex Numbers
Every complex number has two pieces: a magnitude (length) and a phase (angle). Drag the sliders below to see how the polar form (magnitude and phase) relates to the Cartesian form (real and imaginary parts).
This widget lives at the heart of the qubit story. In quantum computing, amplitudes are
complex numbers — and their phases are what make quantum interference possible. See
the full story in
Lesson 1: Bits, chance, and complex numbers
.