2002/01/18 by Nicolas Gisin, N. Gisin, B. Gisin +1 · 1 citation
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph
paper · pdf · doi:10.1016/s0375-9601(02)00428-0
published as Physics Letters A, 297, 279-284, 2002 · 5 pages, 5 figures
arxiv created 2002/01/18 · openalex publication_date 2002/05/01 · arxiv updated 2013/01/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In an entanglement swapping process two initially uncorrelated qubits become entangled, without any direct interaction. We present a model using local variables aiming at reproducing this remarkable process, under the realistic assumption of finite detection efficiencies. The model assumes that the local variables describing the two qubits are initially completely uncorrelated. Nevertheless, we show that once conditioned on the Bell measurement result, the local variables bear enough correlation to simulate quantum measurement results with correlation very close to the quantum prediction. When only a partial Bell measurement is simulated, as carried out is all experiments so far, then the model recovers analytically the quantum prediction.