Σύγκριση μεθόδων

	Εκτίμηση Κβαντικής Φάσης	Παραλλακτικός Υπολογιστής Ιδιοτιμών (Variational Quantum Eigensolver)
Πεδίο	Κβαντική Υπολογιστική	Κβαντική Υπολογιστική
Οικογένεια	Machine learning	Machine learning
Έτος προέλευσης	1995	2014
Δημιουργός	Alexei Kitaev	Alberto Peruzzo
Τύπος	Subroutine algorithm	Hybrid quantum-classical algorithm
Θεμελιώδης πηγή	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.
Εναλλακτικές ονομασίες	QPE, phase kickback	VQE, hybrid quantum-classical
Συναφείς	3	4
Σύνοψη	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.