विधियों की तुलना करें

	क्वांटम फेज एस्टिमेशन	वैरिएशनल क्वांटम आइजेनसाॅल्वर
क्षेत्र	क्वांटम कंप्यूटिंग	क्वांटम कंप्यूटिंग
परिवार	Machine learning	Machine learning
उद्भव वर्ष	1995	2014
प्रवर्तक	Alexei Kitaev	Alberto Peruzzo
प्रकार	Subroutine algorithm	Hybrid quantum-classical algorithm
मौलिक स्रोत	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.
उपनाम	QPE, phase kickback	VQE, hybrid quantum-classical
संबंधित	3	4
सारांश	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.