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For quantum cryptography you don't need qubits but entangled photons, and you need to be able to create pairs of these and measure the polarization of individua
by ThePhysicist 8y ago
For quantum cryptography you don't need qubits but entangled photons, and you need to be able to create pairs of these and measure the polarization of individual photons with high efficiency. Both of these things can be accomplished at room temperature (though there are technologies for photon detection that require cooling to very low temperatures).
- A2017U1 8y agoIntriguing, thanks for this. Really enjoy the topic but find it hard to parse some claims that come out. D-wave a while ago made some bold statements that were shot down by many respected in the field, yet they seem to be progressing still and putting out papers. Simply measuring power in qubits seems to be not the entire story yet most reporting on the subject often boils down to that. I should read up more.