arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.0152quant-ph
收藏

通过波导参量下转换产生具有最佳亮度的高保真单光子

Producing high fidelity single photons with optimal brightness via waveguided parametric down-conversion

K. Laiho, K. N. Cassemiro, Ch. Silberhorn

摘要:

参量下转换(PDC)提供了控制非高斯态(如Fock态)制造的可能性。然而,在传统的PDC源中,能量和动量守恒引入了严格的频率和光子数相关性,这影响了准备状态的保真度。在我们的工作中,我们优化的单光子Fock态的制备从波导PDC的发射通过光谱滤波。我们通过光子数分辨探测和量子干涉研究了关联效应。我们的测量显示了如何减少混合由于过滤可以评估。用相干态干涉制备的光子,我们建立了实验测量的78%的所产生的目标状态的保真度。

英文摘要:

Parametric down-conversion (PDC) offers the possibility to control the fabrication of non-Gaussian states such as Fock states. However, in conventional PDC sources energy and momentum conservation introduce strict frequency and photon number correlations, which impact the fidelity of the prepared state. In our work we optimize the preparation of single-photon Fock states from the emission of waveguided PDC via spectral filtering. We study the effect of correlations via photon number resolving detection and quantum interference. Our measurements show how the reduction of mixedness due to filtering can be evaluated. Interfering the prepared photon with a coherent state we establish an experimentally measured fidelity of the produced target state of 78%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑