We propose an interferometric scheme for generating the totally antisymmetric state of N identical bosons with N internal levels (generalized singlet). This state is a resource for various problems with dramatic quantum advantage. The procedure uses a sequence of Fourier multi-ports, combined with coincidence measurements filtering the results. Successful preparation of the generalized singlet is confirmed when the N particles of the input state stay separate (anti-bunch) on each multiport. The scheme is robust to local lossless noise and works even with a totally mixed input state.

中文翻译：

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通过相同的粒子干涉测量法稳健地生成 N 部分 N 能级单重态


我们提出了一种干涉方案，用于生成具有 N 个内部能级（广义单重态）的 N 个相同玻色子的完全反对称态。此状态是具有显著量子优势的各种问题的资源。该程序使用一系列傅里叶多端口，并结合符合测量过滤结果。当输入状态的 N 个粒子在每个多端口上保持独立（反束）时，证实了广义单重态的成功制备。该方案对本地无损噪声很鲁棒，即使在完全混合的 input 状态下也能工作。