Bump to entangle
With both Qubis on, hold one in each hand and gently bump them together. Both spheres will flash golden, and a rainbow will appear.
This will create a very specific entangled state, called the singlet state. We will learn about it in the next section.
It doesn't matter what you've done before: every bump resets the state. You can do it as many times as you need, and it doesn't change anything.
Contact force matters. After a couple of tries you'll find the right strength.
Calibrating the bump
- Too gentle: nothing happens. Try harder.
- Just right: both spheres flash. You're entangled.
- Too hard: they vibrate (that's a measurement rather than a bump). Try lighter.
Note that the singlet state is just one kind of entanglement, but it is arguably the most important: it shows up all the time in nature, for example, in the electrons in every helium atom.
For more advanced entanglement, see the learning journey. If you are looking for the famous CNOT gate, then see the section on the CNOT gate.
Included in:Qubi Quickstart