PEI-MING HOKao, Hsien-ChungHsien-ChungKao2018-09-102018-09-102001-1000319007http://inspirehep.net/record/564724http://scholars.lib.ntu.edu.tw/handle/123456789/293050https://www.scopus.com/inward/record.uri?eid=2-s2.0-85038343759&doi=10.1103%2fPhysRevLett.88.151602&partnerID=40&md5=5f09c76dcd1329fda525cd073286f909We derive noncommutative multiparticle quantum mechanics from noncommutative quantum field theory in the nonrelativistic limit. Particles of opposite charges are found to have opposite noncommutativity. As a result, there is no noncommutative correction to the hydrogen atom spectrum at the tree level. We also comment on the obstacles to take noncommutative phenomenology seriously and propose a way to construct noncommutative [Formula presented] grand unified theory. © 2002 The American Physical Society.journal article10.1103/PhysRevLett.88.1516022-s2.0-0037091286WOS:000174773400005