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HNQ
HNQ
11:34 AM
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Q: Is there a second-order non-linear addition to Maxwell's equations?

Aravind KarthigeyanMaxwell's equations are famously linear and are the classical limit of QED. The thing is QED even without charged particles is pretty non-linear with photon-photon interaction terms. Can these photon-photon interaction terms have a "classical" limit as well? Can we just perturbatively expand the ...


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