Bosonization and duality aspects in superfluids and superconductors

Ribeiro, Natalia; Sobreiro, R. F.; Sorella, S. P.

doi:10.1016/j.physleta.2003.08.016

Cited by 1 publication

(1 citation statement)

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“…This equation establishes the singular nature of Υ since θ is clearly singular. An explicit example can be found in [15], where Υ is associated with flux tubes in an Abelian superconductor.…”

Section: A Background Fieldmentioning

confidence: 99%

Effective gravity from a quantum gauge theory in Euclidean spacetime

Sobreiro

Otoya

2007

Class. Quantum Grav.

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We consider a SO(d) gauge theory in an Euclidean d-dimensional space-time, which is known to be renormalizable to all orders in perturbation theory for 2 ≤ d ≤ 4. Then, with the help of a space-time representation of the gauge group, the gauge theory is mapped into a curved space-time with linear connection. Further, in that mapping the gauge field plays the role of the linear connection of the curved space-time and an effective metric tensor arises naturally from the mapping. The obtained action, being quadratic in the Riemann-Christoffel tensor, at a first sight, spoils a gravity interpretation of the model. Thus, we provide a sketch of a mechanism that breaks the SO(d) color invariance and generates the Einstein-Hilbert term, as well as a cosmological constant term, allowing an interpretation of the model as a modified gravity in the Palatini formalism. In that sense, gravity can be visualized as an effective classical theory, originated from a well defined quantum gauge theory. We also show that, in the four dimensional case, two possibilities for particular solutions of the field equations are the de Sitter and Anti de Sitter space-times. * sobreiro@cbpf.br † vjose@cbpf.br

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Section: A Background Fieldmentioning

confidence: 99%