Almost all the explanations of quantum cryptography I've come across simply say that the encryption is "protected by the Heisenberg uncertainty principle". I'm having a little difficulty getting any more detail than that without getting way out of my depth (I'm only an A-level student!). Does anyone know precisely which two properties of photons have the uncertainty relation for polarisation? I'm not sure if it's the horizontal/vertical components of polarization, the rectilinear/diagonal schemes of polarization, or something else entirely like spin...(adsbygoogle = window.adsbygoogle || []).push({});

(Apologies if this thread is in the wrong forum. It's for a research project I'm doing for coursework, but I thought the thread would fit better here than in the homework forum.)

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# Quantum cryptography and uncertainty relations

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