Porovnať metódy

	Kvantové odhadovanie fázy	Variačný kvantový riešiteľ vlastných hodnôt
Odbor	Kvantové výpočty	Kvantové výpočty
Rodina	Machine learning	Machine learning
Rok vzniku	1995	2014
Tvorca	Alexei Kitaev	Alberto Peruzzo
Typ	Subroutine algorithm	Hybrid quantum-classical algorithm
Pôvodný zdroj	Kitaev, A. Y. (1995). Quantum measurements and the Abelian stabilizer problem. arXiv preprint quant-ph/9511026.	Peruzzo, A., McClean, J., Shadbolt, P., et al. (2014). A variational eigenvalue solver on a photonic quantum processor. Nature Communications, 5, 4213.
Ďalšie názvy	QPE, phase kickback	VQE, hybrid quantum-classical
Príbuzné	3	4
Zhrnutie	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 Variational Quantum Eigensolver (VQE) is a hybrid quantum-classical algorithm designed to find the lowest eigenvalue (ground state energy) of a quantum Hamiltonian. Introduced by Peruzzo et al. in 2014, it exploits the variational principle to combine the power of quantum circuits with classical optimization to solve chemistry and materials science problems on near-term quantum devices.