Letters in Mathematical Physics

, Volume 103, Issue 1, pp 19–36

Multilocal Fermionization


    • Institut für Theoretische PhysikUniversität Göttingen
    • Courant Research Centre “Higher Order Structures in Mathematics”Universität Göttingen
  • Gennaro Tedesco
    • Institut für Theoretische PhysikUniversität Göttingen
Open AccessArticle

DOI: 10.1007/s11005-012-0582-5

Cite this article as:
Rehren, K. & Tedesco, G. Lett Math Phys (2013) 103: 19. doi:10.1007/s11005-012-0582-5


We present a simple isomorphism between the algebra of one real chiral Fermi field and the algebra of n real chiral Fermi fields. The isomorphism preserves the vacuum state. This is possible by a “change of localization”, and gives rise to new multilocal symmetries generated by the corresponding multilocal current and stress–energy tensor. The result gives a common underlying explanation of several remarkable recent results on the representation of the free Bose field in terms of free Fermi fields (Anguelova, arXiv:1112.3913, 2011; Anguelova, arXiv:1206.4026, 2012), and on the modular theory of the free Fermi algebra in disjoint intervals (Casini and Huerta, Class Quant Grav 26:185005, 2009; Longo et al., Rev Math Phys 22:331–354, 2010)

Mathematics Subject Classification



CAR algebraconformal field theorymodular theory
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