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arXiv:1010.0498 · International Journal of Theoretical Physics

Faithful Entanglement Sharing for Quantum Communication Against Collective Noise

Hui-Chong Niu, Bao‐Cang Ren, Tie-Jun Wang, Ming Hua, Fu‐Guo Deng

Published Mar 14, 2012• 16 citations
arXivHTMLPDF
DOI
10.1007/s10773-012-1113-y

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This paper presents a scheme for faithfully distributing a pure entanglement between two parties over an arbitrary collective-noise channel with linear optics. The transmission is assisted by an additional qubit against collective noise. The receiver can take advantage of the time discrimination and the measurement results of the assistant qubit to reconstruct a pure entanglement with the sender. Although the scheme succeeds probabilistically, the resource used to get a pure entanglement state is finite, and so is easier to establish entanglement in practice than quantum entanglement purification.
Two faithful quantum secure communication and authentication schemes based on Bell states and classical XOR operation are proposed, which withstand collective noises.The authentication and eavesdropping detection are completed by using logical decoy photons generating by previously shared identity string.The logical decoy photons are decoherence-free states over the two collective noisy channels respectively.The transmission of secret message is a one-time pad system, which guarantees the absolute security of secret message.Encoding secret message after particle transmission ensures the accuracy of secret message.
Abstract Quantum multiplexing provides us with a powerful approach that can distribute entanglement using only a single photonic pulse to interact with remote quantum memories. In common entanglement distribution protocols, the entanglement purification is often exploited if the distributed entanglement is degraded by the channel noise. In this protocol, we propose a faithful entanglement distribution protocol using quantum multiplexing of photon in a collective noise channel. By designing the encoding and decoding setup, our protocol can resist the collective noise. When the protocol is successful, the parties can obtain two pairs of maximally entangled states. When the protocol fails, the parties can still obtain one pair of maximally entangled state. Our protocol does not require the entanglement purification, so that it is more efficient. The above advantages enable our protocol to have important application potential in the future quantum communication field.