Article
Quantum key distribution in the Holevo limit
Author/s | Cabello Quintero, Adán |
Department | Universidad de Sevilla. Departamento de Física Aplicada II |
Publication Date | 2000-12-25 |
Deposit Date | 2024-01-15 |
Published in |
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Abstract | A theorem by Shannon and the Holevo theorem impose that the efficiency of any protocol for quantum key distribution, E , defined as the number of secret (i.e., allowing eavesdropping detection) bits per transmitted bit ... A theorem by Shannon and the Holevo theorem impose that the efficiency of any protocol for quantum key distribution, E , defined as the number of secret (i.e., allowing eavesdropping detection) bits per transmitted bit plus qubit, is E ≤ 1. The problem addressed here is whether the limit E = 1 can be achieved. It is showed that it can be done by splitting the secret bits between several qubits and forcing Eve to have only a sequential access to the qubits, as proposed by Goldenberg and Vaidman. A protocol with E = 1 based on polarized photons and in which Bob's state discrimination can be implemented with linear optical elements is presented. |
Funding agencies | Universidad de Sevilla Junta de Andalucía |
Project ID. | OGICYT-191-97
FQM-239 |
Citation | Cabello Quintero, A. (2000). Quantum key distribution in the Holevo limit. Physical Review Letters, 85 (26), 5635-5638. https://doi.org/10.1103/PhysRevLett.85.5635. |
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