Karim A Malik and David Wands 2004 Class. Quantum Grav. 21 L65 doi:10.1088/0264-9381/21/11/L01
Karim A Malik1 and David Wands2
Show affiliationsWe present a method for constructing gauge-invariant cosmological perturbations which are gauge-invariant up to second order. As an example, we give the gauge-invariant definition of the second-order curvature perturbation on uniform density hypersurfaces. Using only the energy conservation equation, we show that this curvature perturbation is conserved at second order on large scales for adiabatic perturbations.
Issue 11 (7 June 2004)
Received 5 December 2003
Published 24 April 2004
Karim A Malik and David Wands 2004 Class. Quantum Grav. 21 L65
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