Publicação: Scalar quantum field theory in disordered media
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Data
2011-06-21
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Amer Physical Soc
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A free massive scalar field in inhomogeneous random media is investigated. The coefficients of the Klein-Gordon equation are taken to be random functions of the spatial coordinates. The case of a disordered medium modeled by centered stationary and Gaussian processes is analyzed. After performing the averages over the random functions, we obtain the two-point and the four-point Green's functions of the model up to one loop. The disordered scalar quantum field theory becomes qualitatively similar to a lambda phi(4) self-interacting theory with a frequency-dependent coupling.
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Physical Review D. College Pk: Amer Physical Soc, v. 83, n. 12, p. 11, 2011.
