Emergent gravity from vanishing energy-momentum tensor

Emergent gravity from vanishing energy-momentum tensor

Blog Article

Abstract A constraint of vanishing energy-momentum tensor is motivated by a variety of perspectives on quantum gravity.We demonstrate in a concrete example how this constraint leads to a metric-independent theory in which quantum gravity us polo assn mens sweaters emerges as a nonperturbative artifact of regularization-scale physics.We analyze a scalar theory similar to the Dirac-Born-Infeld (DBI) theory with vanishing gauge fields, with the DBI Lagrangian modulated by a scalar potential.In the limit of a large number of scalars, we explicitly demonstrate the existence of a composite massless spin-2 graviton in the spectrum that couples to matter as in Einstein gravity.

We comment on the cosmological constant problem and the generalization to theories here with fermions and gauge fields.