Resilience of multiphoton entanglement under losses

2004/02/29 by G. A. Durkin, Gabriel A. Durkin, Christoph Simon +5
Computer Science · Mathematics · Physics and Astronomy · #Bipartite graph #Concurrence #Discrete mathematics #Mathematics #Multipartite entanglement #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Resilience (materials science) #Squashed entanglement #Statistical physics #quant-ph

paper · pdf · doi:10.1103/physreva.70.062305

published as Phys. Rev. A 70, 062305 (2004) · 5 pages, 3 figures, title changed, minor typographic errors corrected

openalex publication_date 2004/12/03 · arxiv created 2004/12/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We analyze the resilience under photon loss of the bipartite entanglement present in multiphoton states produced by parametric down-conversion. The quantification of the entanglement is made possible by a symmetry of the states that persists even under polarization-independent losses. We examine the approach of the states to the set of positive partial transpose states as losses increase, and calculate the relative entropy of entanglement. We find that some bipartite distillable entanglement persists for arbitrarily high losses.

Citations

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