Four main components

• Initialization and reset(initialization of q0 into a desired state |ψ⟩)
• Quantum gates(single-qubit H gate and two-qubit ⊕ gate)
• Measurements(each qubit as classical outcomes and stores them in the two classical bits)
• Classically conditioned quantum gates

Variational Quantum Eigensolvers

• The quantum block
• The classical block
• Combined operation

Why the Classical Parts?

• Quantum states are fragile

Need to measure and interpret these states at the end of computation