  An approach that allows studying the relationship between the neutralization
of the cosmological constant and instantons for cosmology coupled to
antisymmetric fields is proposed. Using suitable variables, the Lagrangian
leading to the FRW equations can be written analogously to a Ginzburg-Landau
theory and we show how spontaneous symmetry breaking appears. The approach
leads to three possible solutions, if we denote $\Lambda_1$ and $\Lambda_2$ as
the cosmological constants that come from gravity ($\Lambda_1$) and
antisymmetric fields ($\Lambda_2$), then the solutions, a) $
|\Lambda_2|>|\Lambda_1|$ is consistent with a very small but non-zero
$\Lambda_1$, b) $|\Lambda_2|<|\Lambda_1|$, then $\Lambda_1$ is observationally
ruled out and, c) $|\Lambda_2|=|\Lambda_1|$ is a solution with finite action
and instantons restoring the symmetry $\varphi \to -\varphi$. The third
solution is also consistent with neutralization of the cosmological constant in
four dimensions.

High Energy Physics - Theory;General Relativity and Quantum Cosmology;High Energy Physics - Phenomenology