Sugihara, TakanoriTaniguchi, Masa-aki2004-12-032004-12-0320012001http://hdl.handle.net/2003/200710.17877/DE290R-11698enThe American Physical SocietyPhysical Review Letters530Manifestation of a Nontrivial Vacuum in Discrete Light-Cone Quantization10.1103/PhysRevLett.87.271601article (journal)