Jean-Loup Gervais
Gervais worked on quantum field theory , supersymmetry and string theory . In 1969 , he investigated ( together with Benjamin W . Lee ) renormalisability of theories of spontaneous symmetry breaking . In 1971 , he presented with Bunji Sakita a supersymmetric invariant Lagrangian in the framework of a precursor of string theory , called the dual resonance models . 
<triplet> supersymmetry <subj> quantum field theory <obj> studied by