Improving the capacity of the Boström-Felbinger protocol

2003/11/25 by Qing-yu Cai, Bai-wen Li, Baiwen Li
Computer Science · Physics and Astronomy · #Alice (programming language) #Alice and Bob #Computer network #Computer science #Computer security #Eavesdropping #Mode (computer interface) #Operating system #Protocol (science) #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Unitary state #quant-ph

paper · pdf · doi:10.1103/physreva.69.054301

published as Phys. Rev. A 69 054301 (2004) · 3page; PACS:03.67.Hk, 03.65.Ud

arxiv created 2003/11/25 · openalex publication_date 2004/05/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We show that the capacity of the Bostr"om-Felbinger (ping-pong) protocol [Phys. Rev. Lett. 89, 187902 (2002)] can be doubled by introducing two additional unitary operations. In message mode, Alice can use one of the four unitary operations to encode two classical bits of information. Bob can decode Alice's information by using a Bell-basis measurement. Security against eavesdropping attack can be ensured by using two conjugate measurement bases in control mode. A message authentification method can protect this communication against a man-in-the-middle attack without eavesdropping.

Citations

• Accessible Information and Quantum operations
• Unconditional Security of Quantum Key Distribution over Arbitrarily Long Distances
• Quantum cryptography using any two nonorthogonal states
• Eavesdropping on the “Ping-Pong” Quantum Communication Protocol
• Noncommuting Mixed States Cannot Be Broadcast
• Quantum cryptography based on Bell’s theorem
• Quantum cryptography without public announcement of bases