LL_{\infty} Algebras and Field Theory

Jan 30, 2017
54 pages
Published in:
  • Fortsch.Phys. 65 (2017) 3-4, 1700014
  • Published: Mar 1, 2017
e-Print:
Report number:
  • MIT-CTP-4875

Citations per year

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Abstract: (WILEY)
We review and develop the general properties of L∞ algebras focusing on the gauge structure of the associated field theories. Motivated by the L∞ homotopy Lie algebra of closed string field theory and the work of Roytenberg and Weinstein describing the Courant bracket in this language we investigate the L∞ structure of general gauge invariant perturbative field theories. We sketch such formulations for non-abelian gauge theories, Einstein gravity, and for double field theory. We find that there is an L∞ algebra for the gauge structure and a larger one for the full interacting field theory. Theories where the gauge structure is a strict Lie algebra often require the full L∞ algebra for the interacting theory. The analysis suggests that L∞ algebras provide a classification of perturbative gauge invariant classical field theories.
Note:
  • 54 pages, v2: minor changes, refs. added, v3: minor corrections, version published in Fortsch.Phys
  • field theory: perturbation theory
  • invariance: gauge
  • gauge field theory: nonabelian
  • Einstein
  • double field theory
  • field theory: interaction
  • field theory: string
  • algebra: Lie
  • Chern-Simons term
  • Yang-Mills