A Full Quantum Eigensolver for Quantum Chemistry Simulations
Quantum circuit for gradient descent. and denote the initial state of the work system and ancilla syetem, respectively. The controlled operations that acted on the work system are . denotes number Hadamard gates. At the end of the circuit, we measure the final state of the ancilla registers. If all ancilla qubits are , the work systerm collapses into state .