Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-03-13
Phys.Rev. D62 (2000) 046007
Physics
High Energy Physics
High Energy Physics - Theory
Latex, 31 pages
Scientific paper
10.1103/PhysRevD.62.046007
A field theory formulation of two-time physics in d+2 dimensions is obtained from the covariant quantization of the constraint system associated with the OSp(n|2) 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 d+2 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 d+2 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 d+2 dimensional spacetime. Thus, the two-time d+2 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 the evidence for the presence of a higher unifying structure in a d+2 dimensional spacetime. These phenomena have similarities with ideas such as dualities, AdS-CFT correspondence and holography.
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