A qubit made from photons lives in the polarization property of light. This is depicted here as individual glowing wavelets. Coated pieces of glass, such as the cube shown in the video, can separate out different polarization states of light. Other elements can switch the polarization from one state (vertical) to the other (horizontal). Photon qubits can also live in other properties, such as color. (Credit: Olena Shmahalo)
Credit: Olena Shmahalo/The Quantum Atlas (CC BY-NC-SA 4.0)