Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-07-18
Phys.Rev.B80:245406,2009
Physics
High Energy Physics
High Energy Physics - Theory
5pp, v2: improved version, to appear in PRB
Scientific paper
10.1103/PhysRevB.80.245406
We adopt the Dirac model for graphene and calculate the Casimir interaction energy between a plane suspended graphene sample and a parallel plane perfect conductor. This is done in two ways. First, we use the Quantum Field Theory (QFT) approach and evaluate the leading order diagram in a theory with 2+1 dimensional fermions interacting with 3+1 dimensional photons. Next, we consider an effective theory for the electromagnetic field with matching conditions induced by quantum quasi-particles in graphene. The first approach turns out to be the leading order in the coupling constant of the second one. The Casimir interaction for this system appears to be rather weak. It exhibits a strong dependence on the mass of the quasi-particles in graphene.
Bordag Michael
Fialkovsky Ignat V.
Gitman Dmitri M.
Vassilevich Dmitri V.
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