Compara mètodes

	Estimació de Fase Quàntica	Algorisme Aproximat Quàntic per a l'Optimització
Camp	Computació quàntica	Computació quàntica
Família	Machine learning	Machine learning
Any d'origen	1995	2014
Autor original	Alexei Kitaev	Edward Farhi
Tipus	Subroutine algorithm	Hybrid quantum-classical algorithm
Font seminal	Kitaev, A. Y. (1995). Quantum measurements and the Abelian stabilizer problem. arXiv preprint quant-ph/9511026.	Farhi, E., Goldstone, J., Gutmann, S. (2014). A quantum approximate optimization algorithm. arXiv preprint arXiv:1411.4028.
Àlies	QPE, phase kickback	QAOA, quantum alternating operator ansatz
Relacionats	3	4
Resum	Quantum Phase Estimation (QPE) is a fundamental quantum subroutine that estimates the eigenvalues of a unitary operator. Developed by Alexei Kitaev in 1995, QPE combines controlled unitary evolution with the quantum Fourier transform to extract eigenvalues from quantum states with exponential precision scaling.	The Quantum Approximate Optimization Algorithm (QAOA) is a hybrid quantum-classical algorithm designed to solve combinatorial optimization problems on near-term quantum devices. Introduced by Farhi, Goldstone, and Gutmann in 2014, QAOA encodes optimization problems into quantum circuits and uses classical optimization to tune circuit parameters, aiming to find approximately optimal solutions for problems like MaxCut, graph coloring, and scheduling.