Elementary optical gate for expanding an entanglement web

2008/03/13 by Toshiyuki Tashima, Şahin Kaya Özdemir, Sahin Kaya Ozdemir +3
Chemistry · Computer Science · Physics and Astronomy · #Algorithm #Chemistry #Computer science #Controlled NOT gate #Fock state #Optoelectronics #Photon #Photon entanglement #Physics #Polarization (electrochemistry) #Postselection #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum network #State (computer science) #quant-ph

paper · pdf · doi:10.1103/physreva.77.030302

published as Phys. Rev. A 77, 030302(R) (2008) · 5 pages, 2 figures. To appear in Phys. Rev. A

arxiv created 2008/03/13 · openalex publication_date 2008/03/25 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We introduce an elementary optical gate for expanding polarization entangled W states in which every pair of photons is entangled alike. The gate is composed of a pair of 50:50 beamsplitters and ancillary photons in the two-photon Fock state. By seeding one of the photons in an n-photon W state into this gate, we obtain an (n+2)-photon W state after postselection. This gate gives a better efficiency and a simpler implementation than previous proposals for W-state preparation.

Citations

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