Contributor info: Mr Josh O'Connor

Nicolas Boulanger, Paul P. Cook, Josh A. O'Connor, Peter West

SciPost Phys. 18, 149 (2025) · published 6 May 2025 | Toggle abstract · pdf

We work out the unfolded formulation of the fields in the non-linear realisation of $E_{11}$. Using the connections in this formalism, we propose, at the linearised level, an infinite number of first-order duality relations between the dual fields in $E_{11}$. In this way, we introduce extra fields that do not belong to $E_{11}$ and we investigate their origin. The equations of motion of the fields are obtained by taking derivatives and higher traces of the duality relations.