Reddy D V, Raymer M G, McKinstrie C J
Opt Lett. 2014 May 15;39(10):2924-7. doi: 10.1364/OL.39.002924.
Long-distance quantum communication relies on storing and retrieving photonic qubits in orthogonal field modes. The available degrees of freedom for photons are polarization, spatial-mode profile, and temporal/spectral profile. To date, methods exist for decomposing, manipulating, and analyzing photons into orthogonal polarization modes and spatial modes. Here we propose and theoretically verify the first highly efficient method to carry out analogous operations for temporally and spectrally overlapping, but field-orthogonal, temporal modes. The method relies on cascaded nonlinear-optical quantum frequency conversion.
长距离量子通信依赖于在正交场模式中存储和检索光子量子比特。光子可用的自由度包括偏振、空间模式分布以及时间/光谱分布。迄今为止，已有将光子分解、操纵和分析为正交偏振模式和空间模式的方法。在此，我们提出并从理论上验证了第一种高效方法，用于对时间和光谱重叠但场正交的时间模式执行类似操作。该方法依赖于级联非线性光学量子频率转换。
