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Eugeniu Plamadeala edited untitled.tex
about 9 years ago
Commit id: daab9c6b27ced6892dd18761e378ed9dd93d8181
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We agree that $\rho_e = \rho_R + \rho_L = e \sum_I \left( \psi^\dagger_{R,I} \psi_{R,I} + \psi^\dagger_{L,I} \psi_{L,I} \right)$.
Then the continuity equation implies
$$ j_e(x) = \frac{e}{\pi} \sum_{I=1}^N \sum_{J=1}^{2N} \left[ V_{I,J}
+ - V_{N+I,J} \right]
\eta_{JJ} \partial_x \phi_J(x) $$
or equivalently
$$ j_e(x) = \frac{e}{\pi} \sum_{I,J=1}^N \left[ (V^R_{IJ}+V^{LR}_{N+I,J}) \partial_x \phi_J - (V^L_{N+I,N+J} + V^{RL}_{I,N+J}) \partial_x \phi_{N+J} \right] $$