Remarks on the Chern-Simons photon term in the QED description of graphene

Autor(es)

Dudal, David ; Mizher, Ana Julia ; Pais, Pablo

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 98, n. 6, p. 11-pg., 2018-09-10.

Resumo

We revisit the Coleman-Hill theorem in the context of reduced planar QED. Using the global U(1) Ward identity for this nonlocal but still gauge-invariant theory, we can confirm that the topological piece of the photon self-energy at zero momentum does not receive further quantum corrections apart from the potential one-loop contribution, even when considering the Lorentz-noninvariant case due to the Fermi velocity v(F) < c. This is of relevance to probe possible time parity odd dynamics in a planar sheet of graphene which has an effective description in terms of (2 + 1)-dimensional planar reduced QED. (AU)

• Processo FAPESP: 16/12705-7 - Campos magnéticos em colisões de íons pesados: efeitos em observáveis
• Beneficiário: Ana Júlia Silveira Mizher
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado