A double sigma model for double field theory
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- Copland, N.B. J. High Energ. Phys. (2012) 2012: 44. doi:10.1007/JHEP04(2012)044
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We show that generalised metric equation of motion of doubled field theory (the vanishing of the generalised Ricci tensor) can be derived as the background field equation of a double sigma model. Thus the double field theory is the effective field theory for the sigma model.