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Different approaches to the second-order Klein-Gordon equation
journal contribution
posted on 2023-06-07, 22:41 authored by Karim A Malik, David SeeryDavid Seery, Kishore N AnandaWe derive the Klein-Gordon equation for a single scalar field coupled to gravity at second order in perturbation theory and leading order in slow-roll. This is done in two ways: we derive the Klein-Gordon equation first using the Einstein field equation and then directly from the action after integrating out the constraint equations. We also point out an unexpected result regarding the treatment of the field equations
History
Publication status
- Published
Journal
Classical and Quantum GravityISSN
02649381External DOI
Issue
17Volume
25Department affiliated with
- Physics and Astronomy Publications
Notes
Author list in alphabetical oderFull text available
- No
Peer reviewed?
- Yes