Artículos de revistas
Scalar quantum field theory in disordered media
Fecha
2011-06-21Registro en:
Physical Review D. College Pk: Amer Physical Soc, v. 83, n. 12, p. 11, 2011.
1550-7998
10.1103/PhysRevD.83.125022
WOS:000291890100008
WOS000291890100008.pdf
5704289678296630
Autor
Centro Brasileiro de Pesquisas Físicas (CBPF)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.