文摘
Recently it was shown that standard odd- and even-dimensional general relativity can be obtained from a $(2n+1)$ -dimensional Chern–Simons Lagrangian invariant under the $B_{2n+1}$ algebra and from a $(2n)$ -dimensional Born–Infeld Lagrangian invariant under a subalgebra ${\mathcal {L}}^{B_{2n+1}}$ , respectively. Very recently, it was shown that the generalized In?nü–Wigner contraction of the generalized AdS–Maxwell algebras provides Maxwell algebras of types ${\mathcal {M}}_{m}$ which correspond to the so-called $B_{m}$ Lie algebras. In this article we report on a simple model that suggests a mechanism by which standard odd-dimensional general relativity may emerge as the weak coupling constant limit of a $(2p+1)$ -dimensional Chern–Simons Lagrangian invariant under the Maxwell algebra type ${\mathcal {M}}_{2m+1}$ , if and only if $m\ge p$ . Similarly, we show that standard even-dimensional general relativity emerges as the weak coupling constant limit of a $(2p)$ -dimensional Born–Infeld type Lagrangian invariant under a subalgebra ${\mathcal {L}}^{{\mathcal {M}}_{\mathbf {2m}}}$ of the Maxwell algebra type, if and only if $m\ge p$ . It is shown that when $m<p$ this is not possible for a $(2p+1)$ -dimensional Chern–Simons Lagrangian invariant under the ${\mathcal {M}}_{2m+1}$ and for a $(2p)$ -dimensional Born–Infeld type Lagrangian invariant under the ${\mathcal {L}}^{{\mathcal {M}} _{\mathbf {2m}}}$ algebra.