Jämför metoder

	Grovers algoritm	Kvantnyckeldistribution (BB84)	Quantum Phase Estimation
Ämnesområde	Kvantdatorteknik	Kvantdatorteknik	Kvantdatorteknik
Familj	Machine learning	Machine learning	Machine learning
Ursprungsår	1996	1984	1995
Upphovsperson	Lov Grover	Charles Bennett and Gilles Brassard	Alexei Kitaev
Typ	Quantum algorithm	Cryptographic protocol	Subroutine algorithm
Ursprungskälla	Grover, L. K. (1996). A fast quantum mechanical algorithm for database search. Proceedings of the 28th Annual ACM Symposium on Theory of Computing (STOC), 212–219.	Bennett, C. H., Brassard, G. (1984). Quantum cryptography: public key distribution and coin tossing. Proceedings of IEEE International Conference on Computers, Systems, and Signal Processing, 175–179.	Kitaev, A. Y. (1995). Quantum measurements and the Abelian stabilizer problem. arXiv preprint quant-ph/9511026.
Alias	quantum search, amplitude amplification	BB84, quantum cryptography	QPE, phase kickback
Närliggande	3	2	3
Sammanfattning	Grover's Algorithm is a quantum algorithm for searching an unsorted database, offering a quadratic speedup over classical linear search. Proposed by Lov Grover in 1996, it exploits quantum superposition and amplitude amplification to find a target item among N items in O(√N) queries, compared to the classical O(N) requirement.	Quantum Key Distribution (QKD) BB84 is a cryptographic protocol allowing two parties to establish a shared secret key using quantum mechanics. Proposed by Bennett and Brassard in 1984, BB84 provides information-theoretic security: an eavesdropper's presence is guaranteed to be detected, and the secret key is provably secure against unlimited computational power.	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.