关键词: 量子通信, 局域网, 纠缠交换, 载波侦听多址/碰撞检测

Abstract:

This paper presents a scheme for Quantum Local Area Networks (QLAN) based on entanglement swapping and classical switching, in which the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol is applied to implement multiple users communication, the message on building and releasing channel, etc. is transferred by the classical switch, and the entanglement of photons between sender and receiver is built by entanglement swapping and quantum information is transferred by the principle of quantum teleportation. Performance analysis results show that the throughput of QLAN increases greatly with higher probabilities with which entanglement is built between sender’s photons and receiver’s photons, the sender finishes the joint Bell state measurement successfully and the receiver detects the sender’s qubit information, respectively.

Key words: quantum communications, local area networks, entanglement swapping, CSMA/CD