Abstract
A field theory formulation of two-time physics in dimensions is obtained from the covariant quantization of the constraint system associated with the worldline gauge symmetries of two-time physics. Interactions among fields can then be included consistently with the underlying gauge symmetries. Through this process a relation between Dirac’s work in 1936 on conformal symmetry in field theory and the more recent worldline formulation of two-time physics is established while providing a worldline gauge symmetry basis for the field equations in dimensions. It is shown that the field theory formalism goes well beyond Dirac’s goal of linearizing conformal symmetry. In accord with recent results in the worldline approach of two-time physics, the field theory can be brought down to diverse d-dimensional field theories by solving the subset of field equations that correspond to the “kinematic” constraints. This process embeds the one “time” in d dimensions in different ways inside the -dimensional spacetime. Thus, the two-time field theory appears as a more fundamental theory from which many one-time d-dimensional field theories are derived. It is suggested that the hidden symmetries and relations among computed quantities in certain d-dimensional interacting field theories can be taken as evidence for the presence of a higher unifying structure in a -dimensional spacetime. These phenomena have similarities with ideas such as dualities, AdS-CFT correspondence, and holography.
- Received 15 March 2000
DOI:https://doi.org/10.1103/PhysRevD.62.046007
©2000 American Physical Society