A variational principle is introduced which minimizes an action formulated for configurations of vacuum Dirac seas. The action is analyzed in position and momentum space. We relate the corresponding Euler– Lagrange equations to the notion of state stability. Examples of numerical minimizers are constructed and discussed.
"An action principle for the masses of Dirac particles." Adv. Theor. Math. Phys. 13 (6) 1653 - 1711, December 2009.