I'm currently working through Nielsen & Chuang's section on the circuit design for implementing the QFT. I'm confused as to why swap gates are used in the model to swap the order of qubits. Heres what i'm looking at http://www.johnboccio.com/research/quantum/notes/QC10th.pdf [Broken] page 247 figure 5.1(adsbygoogle = window.adsbygoogle || []).push({});

Can anybody help?

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# Quantum Fourier Transform

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