Weakly constrained double field theory as the double copy of Yang-Mills theory
Weakly constrained double field theory as the double copy of Yang-Mills theory
The weakly constrained double field theory, in the sense of Hull and Zwiebach, captures the subsector of string theory on toroidal backgrounds that includes gravity, $B$-field, and dilaton together with all of their massive Kaluza-Klein and winding modes, which are encoded in doubled coordinates subject to the ``weak constraint.'' Due …