2010/12/31 by Rikizo Ikuta, Yohei Ono, Toshiyuki Tashima +3 · 1 citation
Computer Science · Physics and Astronomy · #Amplitude damping channel #Computer science #Lossy compression #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum decoherence #Quantum entanglement #Quantum key distribution #Quantum mechanics #Quantum network #Quantum sensor #quant-ph
paper · pdf · doi:10.1103/physrevlett.106.110503
published as Phys. Rev. Lett. 106, 110503 (2011) [4 pages] · 5pages, 5figures
openalex publication_date 2011/03/14 · arxiv created 2011/06/09 · arxiv updated 2011/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose and demonstrate a scheme for boosting the efficiency of entanglement distribution based on a decoherence-free subspace over lossy quantum channels. By using backward propagation of a coherent light, our scheme achieves an entanglement-sharing rate that is proportional to the transmittance T of the quantum channel in spite of encoding qubits in multipartite systems for the decoherence-free subspace. We experimentally show that highly entangled states, which can violate the Clauser-Horne-Shimony-Holt inequality, are distributed at a rate proportional to T.