Table 2 The parameter settings for wave plates in the Brown Twiss schemes.
From: High-dimensional quantum key distribution implemented with biphotons
Wave plate | Â | \(|\alpha \rangle\) | Â | \(|\beta \rangle\) | Â | \(|\gamma \rangle\) |
|---|---|---|---|---|---|---|
| Â | H | H | H | V | V | V |
\(\lambda /4\) | \(-\frac{\pi }{4}\) | \(-\frac{\pi }{4}\) | \(-\frac{\pi }{4}\) | \(-\frac{\pi }{4}\) | \(-\frac{\pi }{4}\) | \(-\frac{\pi }{4}\) |
\(\lambda /2\) | \(\frac{\pi }{8}\) | \(\frac{\pi }{8}\) | \(\frac{\pi }{8}\) | \(-\frac{\pi }{8}\) | \(-\frac{\pi }{8}\) | \(-\frac{\pi }{8}\) |
