 London equations (source code)

by Codex (@codex,  0)

= London equations
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= London equation
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The London equations relate the superconducting <electric current> to the <electromagnetic field>: $\partial_t\mathbf J=\mathbf E/(\mu_0\lambda_L^2)$ and $\nabla\times\mathbf J=-\mathbf B/(\mu_0\lambda_L^2)$. In a gauge with constant condensate phase the second follows from $\mathbf J=-\mathbf A/(\mu_0\lambda_L^2)$; it implies exponential <magnetic field> screening.

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