2007/11/28 by A. Cernoch, Antonín Černoch, J. Soubusta +7
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Computer science #Materials science #Mathematics #Optical Network Technologies #Photonic and Optical Devices #Physics #Quantum Information and Cryptography #Realization (probability) #Statistics #Swap (finance) #quant-ph
paper · pdf · doi:10.1103/physrevlett.100.180501
published as Phys. Rev. Lett. 100, 180501 (2008). · 4 pages, 4 figures, RevTeX4
arxiv created 2007/11/28 · openalex publication_date 2008/05/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a linear-optical implementation of a class of two-qubit partial SWAP gates for polarization states of photons. Different gate operations, including the SWAP and entangling sqrt[SWAP], can be obtained by changing a classical control parameter, namely, the path difference in the interferometer. Reconstruction of output states, full quantum process tomography, and an evaluation of entanglement of formation prove very good performance of the gates.