Quantum computing is about programming a quantum computer, which is made out of qubits. Qubits are themselves objects which obey the rules of quantum mechanics.

Classical bits in an Intel CPU are realized via voltage levels. For example, 5V is considered 1 while 0V is consdiered 0. Qubits are realized as two-level quantum systems. There are many ways to create a two-level quantum system. For example, you could make it out.

• Qubit
• Quantum register