TY - JOUR
T1 - Direct characterization of a nonlinear photonic circuit's wave function with laser light
AU - Lenzini, Francesco
AU - Poddubny, Alexander N.
AU - Titchener, James
AU - Fisher, Paul
AU - Boes, Andreas
AU - Kasture, Sachin
AU - Haylock, Ben
AU - Villa, Matteo
AU - Mitchell, Arnan
AU - Solntsev, Alexander S.
AU - Sukhorukov, Andrey A.
AU - Lobino, Mirko
N1 - Publisher Copyright: © The Author(s) 2018.
PY - 2018/1/12
Y1 - 2018/1/12
N2 - Integrated photonics is a leading platform for quantum technologies including nonclassical state generation 1, 2, 3, 4, demonstration of quantum computational complexity 5 and secure quantum communications 6. As photonic circuits grow in complexity, full quantum tomography becomes impractical, and therefore an efficient method for their characterization 7, 8 is essential. Here we propose and demonstrate a fast, reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical circuit. By establishing a rigorous correspondence between the generated quantum state and classical sum-frequency generation measurements from laser light, we overcome the limitations of previous approaches for lossy multi-mode devices 9, 10. We applied this protocol to a multi-channel nonlinear waveguide network and measured a 99.28±0.31% fidelity between classical and quantum characterization. This technique enables fast and precise evaluation of nonlinear quantum photonic networks, a crucial step towards complex, large-scale, device production.
AB - Integrated photonics is a leading platform for quantum technologies including nonclassical state generation 1, 2, 3, 4, demonstration of quantum computational complexity 5 and secure quantum communications 6. As photonic circuits grow in complexity, full quantum tomography becomes impractical, and therefore an efficient method for their characterization 7, 8 is essential. Here we propose and demonstrate a fast, reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical circuit. By establishing a rigorous correspondence between the generated quantum state and classical sum-frequency generation measurements from laser light, we overcome the limitations of previous approaches for lossy multi-mode devices 9, 10. We applied this protocol to a multi-channel nonlinear waveguide network and measured a 99.28±0.31% fidelity between classical and quantum characterization. This technique enables fast and precise evaluation of nonlinear quantum photonic networks, a crucial step towards complex, large-scale, device production.
UR - http://www.scopus.com/inward/record.url?scp=85040454495&partnerID=8YFLogxK
U2 - https://doi.org/10.1038/lsa.2017.143
DO - https://doi.org/10.1038/lsa.2017.143
M3 - مقالة
SN - 2095-5545
VL - 7
JO - Light: Science and Applications
JF - Light: Science and Applications
IS - 1
M1 - 17143
ER -