s**********p
发帖数: 17 | 1 The parametric down conversion crystal is BBO(beta-Barium Borate). The
entangled state is contructed according to one of the four Bell-EPR states,
and the violation of Bell inequality is measured by the CHSH inequality. The
quantum key distribution rate is 10 bits/s. They send a synchronous signal
from another optical channel to gate the coincidence measurement.
The transmission rate is 70% with 3000 pairs of entangled photons left for
spacelike Eves. :) Is it because the telescope they built, t |
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