Tomohiro Matsuda 2009 Class. Quantum Grav. 26 145011 doi:10.1088/0264-9381/26/14/145011
Tomohiro Matsuda
Show affiliationsA mechanism for generating metric perturbations in inflationary models is considered. Long-wavelength inhomogeneities of light scalar fields in a decoupled sector may give rise to superhorizon fluctuations of couplings and masses in the low-energy effective action. Cosmological phase transitions may then occur that are not simultaneous in space, but occur with time lags in different Hubble patches that arise from the long-wavelength inhomogeneities. Here an interesting model in which cosmological perturbations may be created at the electroweak phase transition is considered. The results show that phase transitions may be a generic source of non-Gaussianity.
Issue 14 (21 July 2009)
Received 13 September 2008, in final form 6 June 2009
Published 26 June 2009
Tomohiro Matsuda 2009 Class. Quantum Grav. 26 145011
Jun Lu et al 2008 Supercond. Sci. Technol. 21 115011
Joo-Hyung Lee et al 2008 J. Micromech. Microeng. 18 125015
D M Pickup et al 2007 J. Phys.: Condens. Matter 19 415116
G Brodin and M Marklund 2008 New J. Phys. 10 115031
Evelyne Roueff and Eric Herbst 2009 J. Phys.: Conf. Ser. 192 012008
Svjetlan Feretić and Anthony J Guttmann 2009 J. Phys. A: Math. Theor. 42 485003
A Jeanson et al 2009 J. Phys.: Conf. Ser. 190 012185
J R Verkouteren et al 2008 Meas. Sci. Technol. 19 115101
John Abelson et al 2007 J. Phys.: Condens. Matter 19 450301