Measuring Entangled Qutrits and Their Use for Quantum Bit Commitment
量子物理
2008-11-26 v2
摘要
We produce and holographically measure entangled qudits encoded in transverse spatial modes of single photons. With the novel use of a quantum state tomography method that only requires two-state superpositions, we achieve the most complete characterisation of entangled qutrits to date. Ideally, entangled qutrits provide better security than qubits in quantum bit-commitment: we model the sensitivity of this to mixture and show experimentally and theoretically that qutrits with even a small amount of decoherence cannot offer increased security over qubits.
引用
@article{arxiv.quant-ph/0312072,
title = {Measuring Entangled Qutrits and Their Use for Quantum Bit Commitment},
author = {Nathan K. Langford and Rohan B. Dalton and Michael D. Harvey and Jeremy L. O'Brien and Geoffrey J. Pryde and Alexei Gilchrist and Stephen D. Bartlett and Andrew G. White},
journal= {arXiv preprint arXiv:quant-ph/0312072},
year = {2008}
}
备注
Paper updated to match published version; 5 pages, 4 figures, images have been included at slightly lower quality for the archive