A very handwaving argument for weak localization is the following:(adsbygoogle = window.adsbygoogle || []).push({});

In a conductor the electron can take many paths leading back to its origin. Consider two of these, being the time reversed of each other and denote them +,-. The classical return probability is:

P_classical = A_{+}^{2}+ A_^{2}

While the quantum mechanical (due to constructive interference) is twice this:

P_quantum = lA_{+}exp(iθ)+A_{-}exp(iθ)l^{2}

The problem I see with this argument is this: Would a path in general not also interfere with other paths besides its own time reversed path? Am I misunderstanding or how exactly is one to interpret this argument.

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# Weak localization

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