Noncommutative Quantum Mechanics from Noncommutative Quantum Field Theory

[[abstract]]We 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 SU(5) grand unified theory.[[incitationindex]]SCI[[booktype]]紙本[[booktype]]電子