Quantum $L_\infty$ Algebras and the Homological Perturbation Lemma

Understand

Quantum $L_\infty$ algebras are a generalization of $L_\infty$ algebras with a scalar product and with operations corresponding to higher genus graphs.

• We construct a minimal model of a given quantum $L_\infty$ algebra via the homological perturbation lemma and show that it's given by a Feynman diagram expansion, computing the effective action in the finite-dimensional Batalin-Vilkovisky formalism.
• We also construct a homotopy between the original and this effective quantum $L_\infty$ algebra.