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Eugeniu Plamadeala edited untitled.tex
about 9 years ago
Commit id: cae416111b6601ae31e9f690f170e8e27a56393a
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index 8325d65..9a6fc77 100644
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And similarly, for the bosons, but with no minus sign:
$$ \delta \phi_I = \epsilon( k_{F,I} + \partial_x \phi_I ) $$
$$ \delta \phi_{N+I} = \epsilon( k_{F,I} + \partial_x \phi_{N+I}) $$
This implies that total momentum of fermions is
$$ P = - \sum_I k_{F,I} ( \psi^\dagger_{R,I} \psi_{R,I} - \psi^\dagger_{L,I} \psi_{L,I} + \sum_I \psi^\dagger_{R,I} (i\partial_x) \psi_{R,I} + \psi^\dagger_{L,I} (i\partial_x) \psi_{L,I} $$