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Figure 5 | EPJ Quantum Technology

Figure 5

From: Arbitrary unitaries in orbital angular momentum of single photons

Figure 5

The number of beam splitters N in the naive and parallelized implementations of d-dimensional \({X}^{k}\) gates. The gates act on \(n=16\) propagations paths in dimensions \(d = 2, 4, 8, 16\) and \(1 \leq k \leq d - 1\). The naive implementation, represented by dark bars, requires as many as 960 beam splitters for \(d = 16\) and \(k = 8\). On the contrary, the parallelized implementation, represented by bright bars, needs only 162 beam splitters in such a case

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