Gravity coupled with matter and foundation of non-commutative geometry TeX Export

@misc{citeulike:775306, abstract = {We first exhibit in the commutative case the simple algebraic relations between the algebra of functions on a manifold and its infinitesimal length element \$ds\$. Its unitary representations correspond to Riemannian metrics and Spin structure while \$ds\$ is the Dirac propagator \$ds = \ts \!\!\$---\$\!\! \ts = D^{-1}\$ where \$D\$ is the Dirac operator. We extend these simple relations to the non commutative case using Tomita's involution \$J\$. We then write a spectral action, the trace of a function of the length element in Planck units, which when applied to the non commutative geometry of the Standard Model will be shown (in a joint work with Ali Chamseddine) to give the SM Lagrangian coupled to gravity. The internal fluctuations of the non commutative geometry are trivial in the commutative case but yield the full bosonic sector of SM with all correct quantum numbers in the slightly non commutative case. The group of local gauge transformations appears spontaneously as a normal subgroup of the diffeomorphism group.}, archivePrefix = {arXiv}, author = {Connes, A.}, citeulike-article-id = {775306}, citeulike-linkout-0 = {http://arxiv.org/abs/hep-th/9603053}, citeulike-linkout-1 = {http://arxiv.org/pdf/hep-th/9603053}, day = {8}, eprint = {hep-th/9603053}, keywords = {algebra, classical-gravity, geometry, gravity, mathematics, physics, quantum, quantum-gravity}, month = {Mar}, posted-at = {2006-07-27 00:15:05}, priority = {3}, title = {Gravity coupled with matter and foundation of non-commutative geometry}, url = {http://arxiv.org/abs/hep-th/9603053}, year = {1996} }

TY - ELEC ID - citeulike:775306 L3 - citeulike-article-id:775306 N2 - We first exhibit in the commutative case the simple algebraic relations between the algebra of functions on a manifold and its infinitesimal length element $ds$. Its unitary representations correspond to Riemannian metrics and Spin structure while $ds$ is the Dirac propagator $ds = \ts \!\!$---$\!\! \ts = D^{-1}$ where $D$ is the Dirac operator. We extend these simple relations to the non commutative case using Tomita's involution $J$. We then write a spectral action, the trace of a function of the length element in Planck units, which when applied to the non commutative geometry of the Standard Model will be shown (in a joint work with Ali Chamseddine) to give the SM Lagrangian coupled to gravity. The internal fluctuations of the non commutative geometry are trivial in the commutative case but yield the full bosonic sector of SM with all correct quantum numbers in the slightly non commutative case. The group of local gauge transformations appears spontaneously as a normal subgroup of the diffeomorphism group. TI - Gravity coupled with matter and foundation of non-commutative geometry KW - algebra KW - classical-gravity KW - geometry KW - gravity KW - mathematics KW - physics KW - quantum KW - quantum-gravity AU - Connes, A PY - 1996/Mar/08/ UR - http://arxiv.org/abs/hep-th/9603053 ER -