In classical computing, the smallest unit of data is a binary digit or bit, which can be either 0 (off) or 1 (on). A quantum bit, or qubit, is the smallest unit of data in quantum computing. Instead of existing as 0s and 1s, the state of a qubit exists on the Bloch sphere. In our QCCD architecture, qubits are made from 2 energy levels in a trapped ion.