2017/05/04 by F. Dieleman, Frederik Dieleman, M. S. Tame +7 · 25 citations
Computer Science · Engineering · Physics and Astronomy · #Beam splitter #Multipartite entanglement #Open quantum system #Optical Network Technologies #Photonic and Optical Devices #Photonics #Physics #Quantum #Quantum Information and Cryptography #Quantum channel #Quantum entanglement #Quantum mechanics #Quantum network #Quantum sensor #Quantum technology #Squashed entanglement #W state #cond-mat.mes-hall #physics.optics #quant-ph
paper · pdf · doi:10.1021/acs.nanolett.7b03372
published in Nano Letters 17(12), 7455-7461 (American Chemical Society) · 7 pages, 4 figures
arxiv created 2017/05/04 · openalex publication_date 2017/11/08 · arxiv updated 2017/12/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A core process in many quantum tasks is the generation of entanglement. It is being actively studied in a variety of physical settings-from simple bipartite systems to complex multipartite systems. In this work we experimentally study the generation of bipartite entanglement in a nanophotonic system. Entanglement is generated via the quantum interference of two surface plasmon polaritons in a beamsplitter structure, i.e., utilizing the Hong-Ou-Mandel (HOM) effect, and its presence is verified using quantum state tomography. The amount of entanglement is quantified by the concurrence and we find values of up to 0.77 ± 0.04. Verifying entanglement in the output state from HOM interference is a nontrivial task and cannot be inferred from the visibility alone. The techniques we use to verify entanglement could be applied to other types of photonic system and therefore may be useful for the characterization of a range of different nanophotonic quantum devices.