Casimir effect for the scalar field under Robin boundary conditions: a functional integral approach
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Data
2004-07-09
Autores
de Albuquerque, L. C.
Cavalcanti, R. M.
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Iop Publishing Ltd
Resumo
In this work we show how to define the action of a scalar field such that the Robin boundary condition is implemented dynamically, i.e. as a consequence of the stationary action principle. We discuss the quantization of that system via functional integration. Using this formalism, we derive an expression for the Casimir energy of a massless scalar field under Robin boundary conditions on a pair of parallel plates, characterized by constants c(1) and c(2). Some special cases are discussed; in particular, we show that for some values of cl and c(2) the Casimir energy as a function of the distance between the plates presents a minimum. We also discuss the renormalization at one-loop order of the two-point Green function in the philambda(4) theory subject to the Robin boundary condition on a plate.
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Journal of Physics A-mathematical and General. Bristol: Iop Publishing Ltd, v. 37, n. 27, p. 7039-7050, 2004.