Editorial note to: Erwin Schrödinger, Dirac electron in the gravitational field I

Abstract

Editorial Note with a mathematical and historical introduction to a 1932 paper by Erwin Schrödinger on the generalization of the Dirac equation to a curved spacetime -- to appear in the 'Golden Oldie' section of the Journal of General Relativity and Gravitation alongside an English translation of that paper. The Schrödinger paper is of interest as the first place that the well-known formula $g^{\mu \nu }{\nabla }_{\mu }{\nabla }_{\nu }+m^2+\frac{R}{4}$ was obtained for the 'square' of the Dirac operator in curved spacetime. This formula is known by a number of names and we explain why we favour the name 'Schrödinger-Lichnerowicz formula'. We also aim to explain how the modern notion of `spin connection' emerged from a debate in the physics journals in the period 1929-1933. We discuss the key contributions of Weyl, Fock and Cartan and explain how and why they were partly in conflict with the approaches of Schrödinger and several other authors. We reference and comment on some previous historical accounts of this topic.

15 pages, no figures. Addendum added mainly to mention that, in addition to the rediscovery of Schrödinger's 1932 formula for the 'square' of the curved spacetime Dirac operator by André Lichnerowicz in 1962/3, it was also rediscovered in 1963 by Asher Peres -- and to discuss again the naming of that formula

References in corpus (1)

• A new $\frac{1}{2}$-Ricci type formula on the spinor bundle and applications

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